CV | Lew Riley

Dr. Lewis A. Riley

Education

Ph.D., Nuclear Physics, Florida State University, 1997
M.S., Physics, Florida State University, 1995
B.S., Physics, Guilford College, 1992

Field of Research : Experimental Nuclear Structure

Professional Experience

Professor, Department of Physics and Astronomy, Ursinus College, 2011-present
- Pre-Engineering Coordinator, 2014-present
- Chair, Department of Physics and Astronomy, 2017-2022
Associate Professor, Department of Physics and Astronomy, Ursinus College, 2006-2011
Assistant Professor, Department of Physics and Astronomy, Ursinus College, 2002-2006
Assistant Professor, Department of Physics and Astronomy, Earlham College, 1997-2002
Research Associate, Physics Department, Florida State University, summers 1998-2000
Research Assistant, Physics Department, Florida State University, 1994-97
Teaching Assistant, Physics Department, Florida State University, 1993-94
Fulbright Fellowship, Bergische Universität Gesamthochschule Wuppertal, Wuppertal, Germany, 1992-93
AIP Summer Internship, Southwest Research Institute, San Antonio, Texas, 1992

Languages : English (native), German

Recent Courses

PHYS111Q and PHYS112 : General Physics I and II
PHYS121Q : Spacetime and Quantum Physics
PHYS122Q : Electricty, Magnetism, and Waves
PHYS201 : Introductory Classical Mechanics
PHYS304 : Thermal Physics
PHYS328W : Analog Electronics
PHYS401 : Applications of Quantum Mechanics
PHYS410 : Classical Mechanics
CIE100 : Common Intellectual Experience
ENV-350: Energy & Environment

Grants and Awards

National Science Foundation, Major Research Instrumentation (MRI) Grant PHY-2405485, “MRI: A New CeBr3 Gamma-Ray Detection Array (CeBrA) for Particle-Gamma Coincidence Experiments at the FSU Super-Enge Split-Pole Spectrograph,” $721,072 (2024-2027).
National Science Foundation, Research in Undergraduate Institutions (RUI) Grant PHY-2208804, “RUI: Shell Structure and Collective Excitations in Exotic Nuclei,” $152,151, supporting research in experimental nuclear structure with undergraduates (2022-2025).
National Science Foundation, Research in Undergraduate Institutions (RUI) Grant PHY-1617250, “RUI: Shell Structure and Core Polarization in Exotic Nuclei,” $135,000, supporting research in experimental nuclear structure with undergraduates (2016-2019).
National Science Foundation, Research in Undergraduate Institutions (RUI) Grant PHY-1303480, “RUI: Shell Structure and Core Polarization in Exotic Nuclei,” $128,493, supporting research in experimental nuclear structure with undergraduates (2013-2016).
National Science Foundation, Research in Undergraduate Institutions (RUI) Grant PHY-0969002, “RUI: Shell Structure and Core Polarization in Exotic Nuclei,” $128,361, supporting research in experimental nuclear structure with undergraduates (2010-2013).
National Science Foundation, Major Research Instrumentation (MRI) Grant PHY-0922615, “MRI: Development of a liquid hydrogen target for use with rare isotope beams,” $99,696 (2009-2010).
Ursinus College Christian R. and Mary F. Lindback Foundation Award for Distinguished Teaching (2008).
National Science Foundation, Research in Undergraduate Institutions (RUI) Grant PHY-0653323, “RUI: Shell Structure of Exotic Neutron-rich Nuclei,” $105,288, supporting research in experimental nuclear structure with undergraduates (2007-2010).
Ursinus College Laughlin Professional Achievement Award (2006).
NSF-RUI Grant PHY-0355129, “RUI: Shell Structure and Isospin Symmetry in Exotic Nuclei,” $86,288, supporting research in experimental nuclear structure with undergraduates (2004-2007).
NSF-RUI Grant PHY-0098774/ PHY-0342281, “Isospin Symmetry and Core Polarization in Z=8 and N=8 Single Closed Shell Nuclei,” $88,000, supporting research in experimental nuclear structure with undergraduates (2001-2004).

Research with Undergraduates

(The names of undergraduates are in boldface.)

Experimental study of ⁵³Cr via the (d,p⁢ γ) reaction, M. Spieker, L. A. Riley, M. Heinze, A. L. Conley, B. Kelly, P. D. Cottle, R. Aggarwal, S. Ajayi, L. T. Baby, S. Baker, I. Conroy, I. B. D’Amato, J. Esparza, S. Genty, I. Hay, K. W. Kemper, M. I. Khawaja, P. S. Kielb, A. N. Kuchera, E. Lopez-Saavedra, A. B. Morelock, J. Piekarewicz, A. Sandrik, V. Sitaraman, E. Temanson, C. Wibisono, and I. Wiedenhoever, Phys. Rev. C 112, 064331 (2025), https://arxiv.org/abs/2601.04346.
Determination of proton and neutron contributions to the 0⁺_g.s. → 2⁺₁ excitations in ⁴²Si and ⁴⁴S using inelastic proton scattering in inverse kinematics and intermediate-energy Coulomb excitation, L. A. Riley, I. Conroy, A. M. Himmelreich, M. Heinze, J. Kosa, B. McNulty, P. D. Cottle, M. Spieker, A. Volya, A. L. Conley, D. Houlihan, B. Kelly, K. W. Kemper, Sk M. Ali, T. Beck, S. A. Gillespie, M. Hausmann, S. Noji, J. Pereira, and D. Weisshaar, J. Chung-Jung, P. Farris, A. Gade, G. Grauvogel, A. M. Hill, Z. Rahman, and R. G. T. Zegers, B. Longfellow, N. D. Pathirana, Phys. Rev. C 112, 014331 (2025), arXiv:2508.00703.
Measurement of g_9/2 strength in the stretched 8⁻ state and other negative parity states via the ⁵¹V(d,p)⁵²V reaction, I. C. S. Hay, P. D. Cottle, L. A. Riley, L. T. Baby, S. Baker, A. L. Conley, J. Esparza, K. Hanselman, M. Heinze, D. Houlihan, B. Kelly, K. W. Kemper, G. W. McCann, R. Renom, A. Sandrik, D. Simms, M. Spieker, and I. Wiedenhöver, Phys. Rev. C 109, 024302 (2024).
Single-neutron adding on $^{34}$S, A. N. Kuchera, C. R. Hoffman, G. Ryan, I. B. D’Amato, O. M. Guarinello, P. S. Kielb, R. Aggarwal, S. Ajayi, A. L. Conley, I. Conroy, P. D. Cottle, J. C. Esparza, S. Genty, K. Hanselman, M. Heinze, D. Houlihan, B. Kelly, M. I. Khawaja, E. Lopez-Saavedra, G. W. McCann, A. B. Morelock, L. A. Riley, A. Sandrik, V. Sitaraman, M. Spieker, E. Temanson, C. Wibisono & I. Wiedenhöver, Eur. Phys. J. A 60, 176 (2024).
The CeBrA demonstrator for particle-gamma coincidence experiments at the FSU Super-Enge Split-Pole Spectrograph, A. L. Conley, B. Kelly, M. Spieker, R. Aggarwal, S. Ajayi, L. T. Baby, S. Baker, C. Benetti, I. Conroy, P. D. Cottle, I. B. D’Amato, P. DeRosa, J. Esparza, S. Genty, K. Hanselman, I. Hay, M. Heinze, D. Houlihan, M. I. Khawaja, P. S. Kielb, A.N. Kuchera, G.W. McCann, A. B. Morelock, E. Lopez-Saavedra, R. Renom, L. A. Riley, G. Ryan, A. Sandrik, V. Sitaraman, E. Temanson, M. Wheeler, C. Wibisono, I. Wiedenhöver, Nucl. Instr. Meth. A1058, 168827 (2023), arXiv.2311.00831.
g_9/2 neutron strength in the N=29 isotones and the ⁵²Cr(d, p)⁵³Cr reaction, L. A. Riley, D. T. Simms, L. T. Baby, A. L. Conley, P. D. Cottle, J. Esparza, K. Hanselman, I. C. S. Hay, M. Heinze, B. Kelly, K. W. Kemper, G. W. McCann, R. Renom, M. Spieker, and I. Wiedenhöver, Phys. Rev. C 108, 044306 (2023), arXiv.2310.06722.
⁵⁴Fe(d, p)⁵⁵Fe and the evolution of single neutron energies in the N=29 isotones, L. A. Riley, I. C. S. Hay, L. T. Baby, A. L. Conley, P. D. Cottle, J. Esparza, K. Hanselman, B. Kelly, K. W. Kemper, K. T. Macon, G. W. McCann, M. W. Quirin, R. Renom, R. L. Saunders, M. Spieker, and I. Wiedenhöver, Phys. Rev. C 106, 064308 (2022), arXiv.2212.04384.
⁵⁰Ti(d, p)⁵¹Ti: Single-neutron energies in the N = 29 isotones, and the N = 32 subshell closure, L. A. Riley, J. M. Nebel-Crosson, K. T. Macon, G. W. McCann, L. T. Baby, D. Caussyn, P. D. Cottle, J. Esparza, K. Hanselman, K. W. Kemper, E. Temanson, and I. Wiedenhöver, Phys. Rev. C 103, 064309 (2021), arXiv:2106.05781.
UCGretina GEANT4 simulation of the GRETINA Gamma-Ray Energy Tracking Array, L. A. Riley, D. Weisshaar, H. L. Crawford, M. L. Agiorgousis, C. M. Campbell, M.Cromaz, P. Fallon, A. Gade, S. D. Gregory, E. B. Haldeman, L. R. Jarvis, E. D. Lawson-John, B. Roberts, B. V. Sadler, C. G. Stine, Nucl. Instr. Meth. A1003, 165305 (2021), arXiv:2104.09986.
Inverse-kinematics proton scattering from ^42,44S, ^41,43P, and the collapse of the N=28 major shell closure, L. A. Riley, D. Bazin, J. Belarge, P. C. Bender, B. A. Brown, P. D. Cottle, B. Elman, A. Gade, S. D. Gregory, E. B. Haldeman, K. W. Kemper, B. R. Klybor, M. A. Liggett, S. Lipschutz, B. Longfellow, E. Lunderberg, T. Mijatovic, J. Pereira, L. M. Skiles, R. Titus, A. Volya, D. Weisshaar, J. C. Zamora, and R. G. T. Zegers, Phys. Rev. C 100, 044312 (2019), arXiv:1910.07986.
Single-Neutron Transfer to ⁵⁰Ti, J. M. Nebel-Crosson, L. Riley, L. T. Baby, P. Cottle, J. C. Esparza, K. Hanselman, K. Kemper, G. McCann, I. Wiedenhöver, A. Conley, S. Lesher, R. Traas, A. Kuchera, G. Selby, Bull. Amer. Phys. Soc. 64, No. 12, HA.00006 (2019).
Spectroscopy of ⁵⁴Ti and the systematic behavior of low-energy octupole states in Ca and Ti isotopes, L. A. Riley, M. L. Agiorgousis, T. R. Baugher, D. Bazin, R. L. Blanchard, M. Bowry, P. D. Cottle, F. G. DeVone, A. Gade, M. T. Glowacki, K. W. Kemper, J. S. Kustina, E. Lunderberg, D. M. McPherson, S. Noji, J. Piekarewicz, F. Recchia, B. V. Sadler, M. Scott, D. Weisshaar, and R. G. T. Zegers, Phys. Rev. C 96, 064315 (2017), arXiv:1712.00411.
Inverse-kinematics proton scattering from ⁴¹P, B.R. Klybor, S.D. Gregory, E.B. Haldeman, L.A. Riley, L.M. Skiles, P.D. Cottle, K.W. Kemper, D. Bazin, J. Belarge, P.C. Bender, B. Elman, A. Gade, S. Lipschutz, B. Longfellow, E. Lunderberg, T. Mijatovic, J. Pereira, R. Titus, D. Weisshaar, J.C. Zamora, and, R.G.T. Zegers, Bull. Amer. Phys. Soc. 62, No. 11, EA.00172 (2017).
Inverse-kinematics proton scattering from ⁴³P, L.M. Skiles, S.D. Gregory, E.B. Haldeman, B.R. Klybor, L.A. Riley, P.D. Cottle, K.W. Kemper, D. Bazin, J. Belarge, P.C. Bender, B. Elman, A. Gade, S. Lipschutz, B. Longfellow, E. Lunderberg, T. Mijatovic, J. Pereira, R. Titus, D. Weisshaar, J.C. Zamora, and, R.G.T. Zegers, Bull. Amer. Phys. Soc. 62, No. 11, EA.00173 (2017).
Determination of the Thickness of the Back Dead-Layer of GRETINA Crystals via Comparisons of Measured Photopeak Efficiencies with GEANT4 Simulations, L. R. Jarvis, C. G. Stine, and L. A. Riley, Bull. Amer. Phys. Soc. 61, No. 13, EA.00112 (2016).
Octupole strength in the neutron-rich calcium isotopes, L. A. Riley, D. M. McPherson, M. L. Agiorgousis, T. R. Baugher, D. Bazin, M. Bowry, P. D. Cottle, F. G. DeVone, A. Gade, M. T. Glowacki, S. D. Gregory, E. B. Haldeman, K. W. Kemper, E. Lunderberg, S. Noji, F. Recchia, B. V. Sadler, M. Scott, D. Weisshaar, and R. G. T. Zegers, Phys. Rev. C 93, 044327 (2016), arXiv:1604.08624.
Inverse-kinematics Proton Scattering from ⁵¹Ca, Sean Gregory, Bull. Amer. Phys. Soc. 60, No. 13, EA.00146 (2015).
Simulation of the GRETINA Scanning Table at Lawrence Berkeley National Laboratory, Ethan Haldeman, Bull. Amer. Phys. Soc. 60, No. 13, EA.00147 (2015).
Inverse-kinematics proton scattering and analysis of ⁵⁴Ti and ⁵⁶Ti, R.L. Blanchard, J.S. Kustina, L.A. Riley, M.L. Agiorgousis, T.R. Baugher, D. Bazin, M. Bowry, P.D. Cottle, F.G. DeVone, A. Gade, M.T. Glowacki, K.W. Kemper, E. Lunderberg, D.M. McPherson, S. Noji, F. Recchia, B.V. Sadler, M. Scott, D. Weisshaar, R.G.T. Zegers, Bull. Amer. Phys. Soc. 59, No. 10, GB.00046 (2014).
Inverse-kinematic proton scattering from ⁵²Ca and Implications for the GRETA Array at FRIB, J.S. Kustina, R.L. Blanchard, L.A. Riley, M.L. Agiorgousis, T.R. Baugher, D. Bazin, M. Bowry, P.D. Cottle, F.G. DeVone, A. Gade, M.T. Glowacki, K.W. Kemper, E. Lunderberg, D.M. McPherson, S. Noji, F. Recchia, B.V. Sadler, M. Scott, D. Weisshaar, R.G.T. Zegers, Bull. Amer. Phys. Soc. 59, No. 10, GB.00048 (2014).
Inverse-kinematics proton scattering on ⁵⁰Ca: Determining effective charges using complementary probes, L. A. Riley, M. L. Agiorgousis, T. R. Baugher, D. Bazin, M. Bowry, P. D. Cottle, F. G. DeVone, A. Gade, M. T. Glowacki, K. W. Kemper, E. Lunderberg, D. M. McPherson, S. Noji, F. Recchia, B. V. Sadler, M. Scott, D. Weisshaar, and R. G. T. Zegers, Phys. Rev. C 90, 011305(R) (2014), arXiv:1407.5348.
Inverse-kinematics proton scattering from ⁵⁰Ca with a liquid hydrogen target and GRETINA, Frank DeVone, Bull. Amer. Phys. Soc. 58, No. 13, EA.00065 (2013).
Inverse-kinematics proton scattering from ⁴⁶Ar with a liquid hydrogen target and GRETINA, Matt Glowacki, Bull. Amer. Phys. Soc. 58, No. 13, EA.00067 (2013).
Inverse-kinematics proton scattering by ^50,52Ca, L.A. Riley, M.L. Agiorgousis, F.G. DeVone, M.T. Glowacki, B.V. Sadler, P.D. Cottle, K.W. Kemper, D.M. McPherson, T.R. Baugher, D. Bazin, M. Bowry, A. Gade, E.M. Lunderberg, S. Noji, M. Scott, D. Weisshaar, R.G.T. Zegers, Bull. Amer. Phys. Soc. 58, No. 13, JD.00007 (2013).
Geant4 simulations of the GRETINA array, Benjamin Roberts, Bull. Amer. Phys. Soc. 57, No. 8, EA00124 (2012).
Fits of Geant4 simulations of GRETINA to source and in-beam spectra, Bryan Sadler, Bull. Amer. Phys. Soc. 57, No. 8, EA00056 (2012).
Gamma-ray spectroscopy of one-proton knockout from ⁴⁵Cl, L. A. Riley, P. Adrich, N. Ahsan, T.R. Baugher, D. Bazin, B. A. Brown, J. M. Cook, P. D. Cottle, C. Aa. Diget, A. Gade, T. Glasmacher, K. E. Hosier, K. W. Kemper, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, A. Volya, and D. Weisshaar, Phys. Rev. C 86, 047301 (2012).
Optimizing fits of Geant4 simulations to measured gamma-ray spectra on a parallel computing cluster, Michael Agiorgousis, Bull. Amer. Phys. Soc. 56, No. 12, EA00002 (2011).
Simulations of the In-Beam Performance of the CAESAR and Gretina Arrays With Liquid-Hydrogen and Solid Targets, Samantha Wildonger, Bull. Amer. Phys. Soc. 56, No. 12, EA00139 (2011).
The Ursinus College Liquid Hydrogen Target, Jessica Palardy, Nicholas Ferrante, Lew Riley, Remco Zegers, Bull. Amer. Phys. Soc. 55, No. 14, EA83 (2010).
The Ursinus College Liquid Hydrogen Target, Nicholas Ferrante, Jessica Palardy, Lew Riley, Remco Zegers, Bull. Amer. Phys. Soc. 55, No. 14, EA38 (2010).
One-proton knockout from ⁸²Ge, B. A. Hartl, J. L. Palardy, L. A. Riley, T. R. Baugher, D. Bazin, A. Gade, T. Glasmacher, G. F. Grinyer, S. McDaniel, R. T. Meharchland, A. Ratkiewicz, K. A. Walsh, D. Weisshaar, Bull. Amer. Phys. Soc. 54, No. 10, GB51 (2009).
One-proton knockout from ⁸³As, J. L. Palardy, B. A. Hartl, L. A. Riley, T. R. Baugher, D. Bazin, A. Gade, T. Glasmacher, G. F. Grinyer, S. McDaniel, R. T. Meharchland, A. Ratkiewicz, K. A. Walsh, D. Weisshaar, Bull. Amer. Phys. Soc. 54, No. 10, GB93 (2009).
Rotational and neutron-hole states in ⁴³S via the neutron knockout and fragmentation reactions, L. A. Riley, P. Adrich, T. R. Baugher, D. Bazin, B. A. Brown, J. M. Cook, P. D. Cottle, C. Aa. Diget, A. Gade, D. A. Garland, T. Glasmacher, K. E. Hosier, K. W. Kemper, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, and D. Weisshaar, Phys. Rev. C 80, 037305 (2009).
Selectivity of the one-neutron knockout reaction on ⁴⁵Cl and the collapse of the N=28 shell closure, L. A. Riley, P. Adrich, T. R. Baugher, D. Bazin, B. A. Brown, J. M. Cook, P. D. Cottle, C. Aa. Diget, A. Gade, D. A. Garland, T. Glasmacher, B. A. Hartl, K. E. Hosier, K. W. Kemper, A. Ratkiewicz, K. P. Siwek, D. C. Stoken, J. A. Tostevin, and D. Weisshaar, Phys. Rev. C79, 051303(R) (2009).
One Neutron Knockout from ⁴⁵Cl, D. C. Stoken, B. A. Hartl, K. E. Hosier, L. A. Riley, P. D. Cottle, K. W. Kemper, P. Adrich, T.R. Baugher, D. Bazin, J. M. Cook, C. Aa. Diget, A. Gade, D. A. Garland, T. Glasmacher, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, and D. Weisshaar, Bull. Amer. Phys. Soc. 54, No. 4, E150 (2009).
Analysis of ^36,38,40Si by Gamma Ray Spectroscopy of Fragmentation Reactions, B. A. Hartl, K. E. Hosier, L. A. Riley, D. C. Stoken P. D. Cottle, K. W. Kemper, P. Adrich, T.R. Baugher, D. Bazin, J. M. Cook, C. Aa. Diget, A. Gade, D. A. Garland, T. Glasmacher, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, and D. Weisshaar, Bull. Amer. Phys. Soc. 54, No. 4, E151 (2009).
d_5/2 proton hole strength in neutron-rich ⁴³P: Shell structure and nuclear shapes near N=28, L. A. Riley, P. Adrich, T. R. Baugher, D. Bazin, B. A. Brown, J. M. Cook, P. D. Cottle, C. Aa. Diget, A. Gade, D. A. Garland, T. Glasmacher, K. E. Hosier, K. W. Kemper, T. Otsuka, W. D. M. Rae, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, Y. Utsuno, and D. Weisshaar, Phys. Rev. C78, 011303(R) (2008).
The One-Neutron Knockout Reaction ⁹Be(⁴⁴S,⁴³S)X, T.R. Baugher, K.E. Hosier, L.A. Riley, P.D. Cottle, K.W. Kemper, P. Adrich, D. Bazin, J.M. Cook, C.A. Diget, A. Gade, D.A. Garland, T. Glasmacher, A. Ratkiewicz, K.P. Siwek, D. Weisshaar, Bull. Amer. Phys. Soc. 52, No. 9, 53 (2007).
One Proton Knockout from a Relativistic ⁴⁵Cl Ion Beam, K.E. Hosier, T.R. Baugher, L.A. Riley, P.D. Cottle, K.W. Kemper, P. Adrich, D. Bazin, J.M. Cook, C.A. Diget, A. Gade, D.A. Garland, T. Glasmacher, A. Ratkiewicz, K.P. Siwek, D. Weisshaar, Bull. Amer. Phys. Soc. 52, No. 9, 58 (2007).
Coulomb Excitation of ⁴⁹Cr (CEU Poster), Kelly Hosier, Darren McGlinchey, Lewis Riley, (October APS/DNP Meeting, Nashville, TN), Bull. Amer. Phys. Soc. 51, No. 6, 54 (2006).
Coulomb Excitation of ⁴⁶V and Testing Isospin Symmetry in the A = 46, T = 1 Multiplet (CEU Poster), J.W. Kremenak, D.C. McGlinchey, L.A. Riley, (October APS/DNP Meeting, Nashville, TN), Bull. Amer. Phys. Soc. 51, No. 6, 56 (2006).
Geant4 Simulations of Gamma Ray Detectors (CEU Poster), D.C. McGlinchey, (October APS/DNP Meeting, Nashville, TN), Bull. Amer. Phys. Soc. 51, No. 6, 57 (2006).
Coulomb excitation of ⁵⁰Mn and Isospin Symmetry in the A=50, T=1 Multiplet (CEU Poster), D.C. McGlinchey, J.W. Kremenak, L.A. Riley, (September APS/DNP Meeting, Maui, HI), Bull. Amer. Phys. Soc. 50, No. 6, 131 (2005).
Thick-target inverse-kinematics proton scattering from ⁴⁶Ar and the N=28 shell below ⁴⁸Ca, L. A. Riley, M. A. Abdelqader, D. Bazin, M. J. Bojazi, B. A. Brown, C. M. Campbell, J. A. Church, P. D. Cottle, D. -C. Dinca, J. Enders, A. Gade, T. Glasmacher, M. Honma, S. Horibe, Z. Hu, K. W. Kemper, W. F. Mueller, H. Olliver, T. Otsuka, B. C. Perry, B. T. Roeder, B. M. Sherrill, T. P. Spencer, and J. R. Terry Phys. Rev. C72, 024311 (2005).
Using GEANT simulations in the analysis of the gamma-ray spectra from intermediate-energy heavy-ion scattering (CEU Poster), Majd Abdelqader, Michael Bojazi, Lew Riley (October 2004 APS/DNP Meeting, Chicago, IL), Bull. Amer. Phys. Soc. 49, No.6, 52 (2004).
Preparing for NSCL Experiment 01011 by Allocating the Beam Time Among the Nuclei of Interest and Using GEANT Simulations in Determining What Factors Influence the Quality of the Measurements (CEU Poster), Michael Bojazi, Majd Abdelqader, Lew Riley, (October 2004 APS/DNP Meeting, Chicago, IL), Bull. Amer. Phys. Soc. 49, No.6, 53 (2004).
Inverse-kinematics proton scattering from ⁴⁶Ar and ⁴⁴S, T.P. Spencer, M.A. Abdelqader, L.A. Riley, (October 2003 APS/DNP Meeting, Tuscon, AZ), Bull. Amer. Phys. Soc. 48, No.8, 59 (2003).
Thick-target Inverse-kinematics Proton Scattering from ^34,36Ar (CEU Poster), M.A. Abdelqader, T.P. Spencer, L.A. Riley, (October 2003 APS/DNP Meeting, Tuscon, AZ), Bull. Amer. Phys. Soc. 48, No.8, 60 (2003).
Lifetime of the 2⁺₁ state and densities for the 0_gs⁺ -> 2₁⁺ transition in ¹⁸Ne, L.A. Riley, P.D. Cottle, M. Brown-Hayes, W.T. Cluff, J.D. Fox, N. Keeley, F.W. Letson, R.A. Kaye, K.W. Kemper, M.T. McEllistrem, S.L. Tabor, J.M. Thompson, and D. Walker, Phys. Rev. C68, 044309 (2003).
Inverse Kinematics Proton Scattering with a Thick Target (CEU Poster), S. Horibe, L.A. Riley, (October 2002 APS/DNP Meeting, East Lansing, MI), Bull. Amer. Phys. Soc. 47, No.6, 48 (2002).
Analysis software for Doppler shift attenuation method experiments (CEU Poster), F. Letson, L.A. Riley, J.M. Thompson, W.T. Cluff, P.D. Cottle, (October 2001 APS/DNP Meeting, Maui, HI), Bull. Amer. Phys. Soc. 46, 103 (2001).
Doppler shift attenuation measurement of the 2⁺₁ state of ¹⁸Ne (CEU Poster), J.M. Thompson, L.A. Riley, F. Letson, W.T. Cluff, P.D. Cottle, (October 2001 APS/DNP Meeting, Maui, HI), Bull. Amer. Phys. Soc. 46, 107 (2001).
Conversion electron-gamma coincidences and intrinsic reflection asymmetry in ²¹⁹Ra, L.A. Riley, P.D. Cottle, M. Fauerbach, V.S. Griffin, B.N. Guy, K.W. Kemper, G.S. Rajbaidya, and O.J. Tekyi-Mensah, Phys. Rev. C60, 021301(R) (2000).
In-beam test of a ‘clover-style’ germanium gamma-ray detector, B.N. Guy, Sponsor: Dr. Lewis A. Riley, Undergraduate Research Conference, Butler University (1999).

Publications in Refereed Journals

Extraction of neutron-capture cross sections on ⁹²Zr using the charge-exchange Oslo method, N. D. Pathirana, R. G. T. Zegers, B. Gao, A. Spyrou, A. C. Larsen, H. Berg, D. Bazin, H. L. Crawford, A. Gade, P. Gastis, T. Ginter, C. J. Guess, M. Guttormsen, S. Noji, B. Longfellow, J. Pereira, L. A. Riley, D. Weisshaar, and J. C. Zamora, Phys. Rev. C 113, 015801 (2026), arXiv:2509.09776.
Experimental study of ⁵³Cr via the (d,p⁢ γ) reaction, M. Spieker, L. A. Riley, M. Heinze, A. L. Conley, B. Kelly, P. D. Cottle, R. Aggarwal, S. Ajayi, L. T. Baby, S. Baker, I. Conroy, I. B. D’Amato, J. Esparza, S. Genty, I. Hay, K. W. Kemper, M. I. Khawaja, P. S. Kielb, A. N. Kuchera, E. Lopez-Saavedra, A. B. Morelock, J. Piekarewicz, A. Sandrik, V. Sitaraman, E. Temanson, C. Wibisono, and I. Wiedenhoever, Phys. Rev. C 112, 064331 (2025), https://arxiv.org/abs/2601.04346.
Determination of proton and neutron contributions to the 0⁺_g.s. → 2⁺₁ excitations in ⁴²Si and ⁴⁴S using inelastic proton scattering in inverse kinematics and intermediate-energy Coulomb excitation, L. A. Riley, I. Conroy, A. M. Himmelreich, M. Heinze, J. Kosa, B. McNulty, P. D. Cottle, M. Spieker, A. Volya, A. L. Conley, D. Houlihan, B. Kelly, K. W. Kemper, Sk M. Ali, T. Beck, S. A. Gillespie, M. Hausmann, S. Noji, J. Pereira, and D. Weisshaar, J. Chung-Jung, P. Farris, A. Gade, G. Grauvogel, A. M. Hill, Z. Rahman, and R. G. T. Zegers, B. Longfellow, N. D. Pathirana, Phys. Rev. C 112, 014331 (2025), arXiv:2508.00703.
Absolute efficiency response of the γ-ray spectrometer GRETINA for high-energy γ rays up to 6 MeV, D. Weisshaar, C.M. Campbell, A. Gade, L.A. Riley, D. Bazin, P.C. Bender, B. Elman, B. Longfellow, D. Rhodes, Nucl. Instr. Meth. A 1081, 170858 (2025).
Single-neutron adding on $^{34}$S, A. N. Kuchera, C. R. Hoffman, G. Ryan, I. B. D’Amato, O. M. Guarinello, P. S. Kielb, R. Aggarwal, S. Ajayi, A. L. Conley, I. Conroy, P. D. Cottle, J. C. Esparza, S. Genty, K. Hanselman, M. Heinze, D. Houlihan, B. Kelly, M. I. Khawaja, E. Lopez-Saavedra, G. W. McCann, A. B. Morelock, L. A. Riley, A. Sandrik, V. Sitaraman, M. Spieker, E. Temanson, C. Wibisono & I. Wiedenhöver, Eur. Phys. J. A 60, 176 (2024).
Measurement of g_9/2 strength in the stretched 8⁻ state and other negative parity states via the ⁵¹V(d,p)⁵²V reaction, I. C. S. Hay, P. D. Cottle, L. A. Riley, L. T. Baby, S. Baker, A. L. Conley, J. Esparza, K. Hanselman, M. Heinze, D. Houlihan, B. Kelly, K. W. Kemper, G. W. McCann, R. Renom, A. Sandrik, D. Simms, M. Spieker, and I. Wiedenhöver, Phys. Rev. C 109, 024302 (2024)
Proton removal from ^73,75Br to ^72,74Se at intermediate energies, M. Spieker, D. Bazin, S. Biswas, P. D. Cottle, P. J. Farris, A. Gade, T. Ginter, S. Giraud, K. W. Kemper, J. Li, S. Noji, J. Pereira, L. A. Riley, M. K. Smith, D. Weisshaar, and R. G. T. Zegers, Phys. Rev. C 109, 014307 (2024).
The CeBrA demonstrator for particle-gamma coincidence experiments at the FSU Super-Enge Split-Pole Spectrograph, A. L. Conley, B. Kelly, M. Spieker, R. Aggarwal, S. Ajayi, L. T. Baby, S. Baker, C. Benetti, I. Conroy, P. D. Cottle, I. B. D’Amato, P. DeRosa, J. Esparza, S. Genty, K. Hanselman, I. Hay, M. Heinze, D. Houlihan, M. I. Khawaja, P. S. Kielb, A.N. Kuchera, G.W. McCann, A. B. Morelock, E. Lopez-Saavedra, R. Renom, L. A. Riley, G. Ryan, A. Sandrik, V. Sitaraman, E. Temanson, M. Wheeler, C. Wibisono, I. Wiedenhöver, Nucl. Instr. Meth. A1058, 168827 (2023), arXiv.2311.00831.
g_9/2 neutron strength in the N=29 isotones and the ⁵²Cr(d, p)⁵³Cr reaction, L. A. Riley, D. T. Simms, L. T. Baby, A. L. Conley, P. D. Cottle, J. Esparza, K. Hanselman, I. C. S. Hay, M. Heinze, B. Kelly, K. W. Kemper, G. W. McCann, R. Renom, M. Spieker, and I. Wiedenhöver, Phys. Rev. C 108, 044306 (2023), arXiv.2310.06722.
Hexadecapole strength in the rare isotopes ^74,76Kr, M. Spieker, S.E. Agbemava, D. Bazin, S. Biswas, P.D. Cottle, P.J. Farris, A. Gade, T. Ginter, S. Giraud, K.W. Kemper, J. Li, W. Nazarewicz, S. Noji, J. Pereira, L.A. Riley, M. Smith, D. Weisshaar, R.G.T. Zegers, Phys. Lett. B 841, 137932 (2023).
⁵⁴Fe(d, p)⁵⁵Fe and the evolution of single neutron energies in the N=29 isotones, L. A. Riley, I. C. S. Hay, L. T. Baby, A. L. Conley, P. D. Cottle, J. Esparza, K. Hanselman, B. Kelly, K. W. Kemper, K. T. Macon, G. W. McCann, M. W. Quirin, R. Renom, R. L. Saunders, M. Spieker, and I. Wiedenhöver, Phys. Rev. C 106, 064308 (2022), arXiv:2212.04384.
Investigation of octupole collectivity near the A = 72 shape-transitional point, M. Spieker, L. A. Riley, P. D. Cottle, K. W. Kemper, D. Bazin, S. Biswas, P. J. Farris, A. Gade, T. Ginter, S. Giraud, J. Li, S. Noji, J. Pereira, M. Smith, D. Weisshaar, and R. G. T. Zegers, Phys. Rev. C 106, 054305 (2022), arXiv:2211.12288.
⁵⁰Ti(d, p)⁵¹Ti: Single-neutron energies in the N = 29 isotones, and the N = 32 subshell closure, L. A. Riley, J. M. Nebel-Crosson, K. T. Macon, G. W. McCann, L. T. Baby, D. Caussyn, P. D. Cottle, J. Esparza, K. Hanselman, K. W. Kemper, E. Temanson, and I. Wiedenhöver, Phys. Rev. C 103, 064309 (2021), arXiv:2106.05781.
UCGretina GEANT4 simulation of the GRETINA Gamma-Ray Energy Tracking Array, L. A. Riley, D. Weisshaar, H. L. Crawford, M. L. Agiorgousis, C. M. Campbell, M.Cromaz, P. Fallon, A. Gade, S. D. Gregory, E. B. Haldeman, L. R. Jarvis, E. D. Lawson-John, B. Roberts, B. V. Sadler, C. G. Stine, Nucl. Instr. Meth. A1003, 165305 (2021), arXiv:2104.09986.
Jacque Raynal, ECIS, and M_n/M_p values in radioactive nuclei, P. D. Cottle, K. W. Kemper, L. A. Riley, Eur. Phys. J. A 56, 256 (2020).
Inverse-kinematics proton scattering from ^42,44S, ^41,43P, and the collapse of the N=28 major shell closure, L. A. Riley, D. Bazin, J. Belarge, P. C. Bender, B. A. Brown, P. D. Cottle, B. Elman, A. Gade, S. D. Gregory, E. B. Haldeman, K. W. Kemper, B. R. Klybor, M. A. Liggett, S. Lipschutz, B. Longfellow, E. Lunderberg, T. Mijatovic, J. Pereira, L. M. Skiles, R. Titus, A. Volya, D. Weisshaar, J. C. Zamora, and R. G. T. Zegers, Phys. Rev. C 100, 044312 (2019), arXiv:1910.07986.
Structure of ⁷⁰Fe: Single-particle and collective degrees of freedom, A. Gade, R. V. F. Janssens, J. A. Tostevin, D. Bazin, J. Belarge, P. C. Bender, S. Bottoni, M. P. Carpenter, B. Elman, S. J. Freeman, T. Lauritsen, S. M. Lenzi, B. Longfellow, E. Lunderberg, A. Poves, L. A. Riley, D. K. Sharp, D. Weisshaar, and S. Zhu, Phys. Rev. C 99, 011301(R) (2019).
Spectroscopy of ⁵⁴Ti and the systematic behavior of low-energy octupole states in Ca and Ti isotopes, L. A. Riley, M. L. Agiorgousis, T. R. Baugher, D. Bazin, R. L. Blanchard, M. Bowry, P. D. Cottle, F. G. DeVone, A. Gade, M. T. Glowacki, K. W. Kemper, J. S. Kustina, E. Lunderberg, D. M. McPherson, S. Noji, J. Piekarewicz, F. Recchia, B. V. Sadler, M. Scott, D. Weisshaar, and R. G. T. Zegers, Phys. Rev. C 96, 064315 (2017), arXiv:1712.00411.
Measuring the entry distribution and the quasi-continuum of gamma rays with tracking arrays, T. Lauritsen, A. Korichi, T.L. Khoo, M.P. Carpenter, R.V.F. Janssens, L.A. Riley, D. Seweryniak and S. Zhu, Phys. Scr. 92, 074002 (2017).
Characterization of a gamma-ray tracking array: A comparison of GRETINA and Gammasphere using a ⁶⁰Co source, T. Lauritsen, A. Korichi, S. Zhu, A.N. Wilson, D. Weisshaar, J. Dudouet, A.D. Ayangeakaa, M.P. Carpenter, C.M. Campbell, E. Clement, H.L. Crawford, M. Cromaz, P. Fallon, J.P. Greene, R.V.F. Janssens, T.L. Khoo, N. Lalovic, I.Y. Lee, A.O Macchiavelli, R.M. Perez-Vidal, S. Pietri, D.C. Radford, D. Ralet, L.A. Riley, D. Seweryniak, O. Stezowski, Nucl. Instr. Meth. A836, 46 (2016).
Octupole strength in the neutron-rich calcium isotopes, L. A. Riley, D. M. McPherson, M. L. Agiorgousis, T. R. Baugher, D. Bazin, M. Bowry, P. D. Cottle, F. G. DeVone, A. Gade, M. T. Glowacki, S. D. Gregory, E. B. Haldeman, K. W. Kemper, E. Lunderberg, S. Noji, F. Recchia, B. V. Sadler, M. Scott, D. Weisshaar, and R. G. T. Zegers, Phys. Rev. C 93, 044327 (2016), arXiv:1604.08624.
Inverse-kinematics proton scattering on ⁵⁰Ca: Determining effective charges using complementary probes, L. A. Riley, M. L. Agiorgousis, T. R. Baugher, D. Bazin, M. Bowry, P. D. Cottle, F. G. DeVone, A. Gade, M. T. Glowacki, K. W. Kemper, E. Lunderberg, D. M. McPherson, S. Noji, F. Recchia, B. V. Sadler, M. Scott, D. Weisshaar, and R. G. T. Zegers,Phys. Rev. C 90, 011305(R) (2014), arXiv:1407.5348.
Gamma-ray spectroscopy of one-proton knockout from ⁴⁵Cl, L. A. Riley, P. Adrich, N. Ahsan, T.R. Baugher, D. Bazin, B. A. Brown, J. M. Cook, P. D. Cottle, C. Aa. Diget, A. Gade, T. Glasmacher, K. E. Hosier, K. W. Kemper, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, A. Volya, and D. Weisshaar, Phys. Rev. C 86, 047301 (2012).
Extraction of Gamow-Teller strength distributions from ⁵⁶Ni and ⁵⁵Co via the (p, n) reaction in inverse kinematics, M. Sasano, G. Perdikakis, R. G. T. Zegers, Sam M. Austin, D. Bazin, B. A. Brown, C. Caesar, A. L. Cole, J. M. Deaven, N. Ferrante, C. J. Guess, G. W. Hitt, M. Honma, R. Meharchand, F. Montes, J. Palardy, A. Prinke, L. A. Riley, H. Sakai, M. Scott, A. Stolz, T. Suzuki, L. Valdez, and K. Yako, Phys. Rev. C 86, 034324 (2012).
Gamow-Teller Transition Strengths from ⁵⁶Ni, M. Sasano, G. Perdikakis, R. G. T. Zegers, Sam M. Austin, D. Bazin, B. A. Brown, C. Caesar, A. L. Cole, J. M. Deaven, N. Ferrante, C. J. Guess, G. W. Hitt, R. Meharchand, F. Montes, J. Palardy, A. Prinke, L. A. Riley, H. Sakai, M. Scott, A. Stolz, L. Valdez, and K. Yako, Phys. Rev. Lett. 107, 202501 (2011).
Rotational and neutron-hole states in ⁴³S via the neutron knockout and fragmentation reactions, L. A. Riley, P. Adrich, T. R. Baugher, D. Bazin, B. A. Brown, J. M. Cook, P. D. Cottle, C. Aa. Diget, A. Gade, D. A. Garland, T. Glasmacher, K. E. Hosier, K. W. Kemper, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, and D. Weisshaar, Phys. Rev. C 80, 037305 (2009).
Selectivity of the one-neutron knockout reaction on ⁴⁵Cl and the collapse of the N=28 shell closure, L. A. Riley, P. Adrich, T. R. Baugher, D. Bazin, B. A. Brown, J. M. Cook, P. D. Cottle, C. Aa. Diget, A. Gade, D. A. Garland, T. Glasmacher, B. A. Hartl, K. E. Hosier, K. W. Kemper, A. Ratkiewicz, K. P. Siwek, D. C. Stoken, J. A. Tostevin, and D. Weisshaar, Phys. Rev. C79, 051303(R) (2009).
d_5/2 proton hole strength in neutron-rich ⁴³P: Shell structure and nuclear shapes near N=28, L. A. Riley, P. Adrich, T. R. Baugher, D. Bazin, B. A. Brown, J. M. Cook, P. D. Cottle, C. Aa. Diget, A. Gade, D. A. Garland, T. Glasmacher, K. E. Hosier, K. W. Kemper, T. Otsuka, W. D. M. Rae, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, Y. Utsuno, and D. Weisshaar, Phys. Rev. C78, 011303(R) (2008).
Intermediate-energy Coulomb excitation of ³⁰Na S. Ettenauer, H. Zwahlen, P. Adrich, D. Bazin, C. M. Campbell, J. M. Cook, A. D. Davies, D.-C. Dinca, A. Gade, T. Glasmacher, J.-L. Lecouey, W. F. Mueller, T. Otsuka, R. R. Reynolds, L. A. Riley, J. R. Terry, Y. Utsuno, and K. Yoneda, Phys. Rev. C78, 017302 (2008)
In-beam gamma-ray spectroscopy at the proton dripline: ²³Al, A. Gade, P. Adrich, D. Bazin, M.D. Bowen, B.A. Brown, C.M. Campbell, J.M. Cook, T. Glasmacher, K. Hosier, S. McDaniel, D. McGlinchery, A. Obertelli, L.A. Riley, K. Siwek, J.A. Tostevin, D. Weisshaar, Phys. Lett. B666, 218 (2008).
Structure of excited states in ²¹Mg studied in one-neutron knockout, C. Aa. Diget, P. Adrich, D. Bazin, M. D. Bowen, B. A. Brown, C. M. Campbell, J. M. Cook, A. Gade, T. Glasmacher, K. Hosier, S. McDaniel, D. McGlinchery, A. Obertelli, L. A. Riley, K. Siwek, J. R. Terry, J. A. Tostevin, and D. Weisshaar, Phys. Rev. C77, 064309 (2008).
Reduction of spectroscopic strength: Weakly-bound and strongly-bound single-particle states studied using one-nucleon knockout reactions, A. Gade, P. Adrich, D. Bazin, M. D. Bowen, B. A. Brown, C. M. Campbell, J. M. Cook, T. Glasmacher, P. G. Hansen, K. Hosier, S. McDaniel, D. McGlinchery, A. Obertelli, K. Siwek, L. A. Riley, J. A. Tostevin, and D. Weisshaar, Phys. Rev. C77, 044306 (2008).
Inverse-kinematics one-proton pickup with intermediate-energy beams: The ⁹Be (²⁰Ne,²¹Na+gamma)X reaction, A. Gade, P. Adrich, D. Bazin, M. D. Bowen, B. A. Brown, C. M. Campbell, J. M. Cook, T. Glasmacher, K. Hosier, S. McDaniel, D. McGlinchery, A. Obertelli, L. A. Riley, K. Siwek, J. A. Tostevin, and D. Weisshaar, Phys. Rev. C76, 061302(R) (2007).
Spectroscopy of ²⁰Mg: The isobaric mass multiplet equation for the 2⁺ states of the A=20, T=2 quintet and distant mirror nuclei, A. Gade, P. Adrich, D. Bazin, M. D. Bowen, B. A. Brown, C. M. Campbell, J. M. Cook, T. Glasmacher, K. Hosier, S. McDaniel, D. McGlinchery, A. Obertelli, L. A. Riley, K. Siwek, and D. Weisshaar, Phys. Rev. C76, 024317 (2007).
Quadrupole collectivity in silicon isotopes approaching neutron number N=28, C.M. Campbell, N. Aoi, D. Bazin, M.D. Bowen, B.A. Brown, J.M. Cook, D.-C. Dinca, A. Gade, T. Glasmacher, M. Horoi, S. Kanno, T. Motobayashi, L.A. Riley, H. Sagawa, H. Sakurai, K. Starosta, H. Suzuki, S. Takeuchi, J.R. Terry, K. Yoneda and H. Zwahlen, Phys. Lett. B652, 169 (2007).
Transition strengths and degree of deformation in ⁷⁹Sr, R. A. Kaye, Y. K. Ryu, S. R. Arora, S. L. Tabor, J. Döring, Y. Sun, T. D. Baldwin, D. B. Campbell, C. Chandler, M. W. Cooper, S. M. Gerbick, O. Grubor-Urosevic, C. R. Hoffman, J. Pavan, L. A. Riley, and M. Wiedeking, Phys. Rev. C75, 034311 (2007).
Evolution of the E(1/2₁⁺)-E(3/2₁⁺) energy spacing in odd-mass K, Cl, and P isotopes for N=20-28, A. Gade, B. A. Brown, D. Bazin, C. M. Campbell, J. A. Church, D. C. Dinca, J. Enders, T. Glasmacher, M. Horoi, Z. Hu, K. W. Kemper, W. F. Mueller, T. Otsuka, L. A. Riley, B. T. Roeder, T. Suzuki, J. R. Terry, K. L. Yurkewicz, and H. Zwahlen, Phys. Rev. C74, 034322 (2006).
Measurement of E2 transition strengths in ^32,34Mg, J. A. Church, C. M. Campbell, D.-C. Dinca, J. Enders, A. Gade, T. Glasmacher, Z. Hu, R. V. F. Janssens, W. F. Mueller, H. Olliver, B. C. Perry, L. A. Riley, and K. L. Yurkewicz, Phys. Rev. C72, 054320 (2005).
Thick-target inverse-kinematics proton scattering from ⁴⁶Ar and the N=28 shell below ⁴⁸Ca, L. A. Riley, M. A. Abdelqader, D. Bazin, M. J. Bojazi, B. A. Brown, C. M. Campbell, J. A. Church, P. D. Cottle, D. -C. Dinca, J. Enders, A. Gade, T. Glasmacher, M. Honma, S. Horibe, Z. Hu, K. W. Kemper, W. F. Mueller, H. Olliver, T. Otsuka, B. C. Perry, B. T. Roeder, B. M. Sherrill, T. P. Spencer, and J. R. Terry, Phys. Rev. C72, 024311 (2005).
Knockout from ⁴⁶Ar: l=3 neutron removal and deviations from eikonal theory, A. Gade, D. Bazin, C. A. Bertulani, B. A. Brown, C. M. Campbell, J. A. Church, D. C. Dinca, J. Enders, T. Glasmacher, P. G. Hansen, Z. Hu, K. W. Kemper, W. F. Mueller, H. Olliver, B. C. Perry, L. A. Riley, B. T. Roeder, B. M. Sherrill, J. R. Terry, J. A. Tostevin, and K. L. Yurkewicz, Phys. Rev. C 71, 051301(R) (2005).
E2 excitation strength in ⁵⁵Ni: Coupling of the ⁵⁶Ni 2₁⁺ collective core vibration to the f_7/2 odd neutron hole, K. L. Yurkewicz, D. Bazin, B. A. Brown, C. M. Campbell, J. A. Church, D.-C. Dinca, A. Gade, T. Glasmacher, M. Honma, T. Mizusaki, W. F. Mueller, H. Olliver, T. Otsuka, L. A. Riley, and J. R. Terry, Phys. Rev. C 70, 064321 (2004).
Nuclear structure in the vicinity of N = Z = 28 ⁵⁶Ni, K. L. Yurkewicz, D. Bazin, B. A. Brown, C. M. Campbell, J. A. Church, D. C. Dinca, A. Gade, T. Glasmacher, M. Honma, T. Mizusaki, W. F. Mueller, H. Olliver, T. Otsuka, L. A. Riley, and J. R. Terry, Phys. Rev. C70, 054319 (2004).
Intermediate-energy Coulomb excitation of ⁵²Fe, K. L. Yurkewicz, D. Bazin, B. A. Brown, C. M. Campbell, J. A. Church, D.-C. Dinca, A. Gade, T. Glasmacher, M. Honma, T. Mizusaki, W. F. Mueller, H. Olliver, T. Otsuka, L. A. Riley, and J. R. Terry, Phys. Rev. C70, 034301 (2004).
Reduced Occupancy of the Deeply Bound 0d_5/2 Neutron State in ³²Ar, A. Gade, D. Bazin, B. A. Brown, C. M. Campbell, J. A. Church, D. C. Dinca, J. Enders, T. Glasmacher, P. G. Hansen, Z. Hu, K. W. Kemper, W. F. Mueller, H. Olliver, B. C. Perry, L. A. Riley, B. T. Roeder, B. M. Sherrill, J. R. Terry, J. A. Tostevin, and K. L. Yurkewicz, Phys. Rev. Lett. 93, 042501 (2004).
One-neutron knockout reactions on proton-rich nuclei with N = 16, A. Gade, D. Bazin, B.A. Brown, C.M. Campbell, J.A. Church, D.C. Dinca, J. Enders, T. Glasmacher, P.G. Hansen, Z. Hu, K.W. Kemper, W.F. Mueller, H. Olliver, B.C. Perry, L.A. Riley, B.T. Roeder, B.M. Sherrill, J.R. Terry, J.A. Tostevin, and K.L. Yurkewicz, Phys. Rev. C69, 034311 (2004).
Lifetime of the 2⁺₁ state and densities for the 0_gs⁺ -> 2₁⁺ transition in ¹⁸Ne, L.A. Riley, P.D. Cottle, M. Brown-Hayes, W.T. Cluff, J.D. Fox, N. Keeley, F.W. Letson, R.A. Kaye, K.W. Kemper, M.T. McEllistrem, S.L. Tabor, J.M. Thompson, and D. Walker, Phys. Rev. C68, 044309 (2003).
Detailed experimental study on intermediate-energy Coulomb excitation of ⁴⁶Ar, A. Gade, D. Bazin, C.M. Campbell, J.A. Church, D.C. Dinca, J. Enders, T. Glasmacher, Z. Hu, K.W. Kemper, W.F. Mueller, H. Olliver, B.C. Perry, L.A. Riley, B.T. Roeder, B.M. Sherrill, and J.R. Terry, Phys. Rev. C68, 014302 (2003).
Transition to the``island of inversion’’ : Fast-beam gamma-ray spectroscopy of ^28,30Na, B.V. Pritychenko, T. Glasmacher, P.D. Cottle, R.W. Ibbotson, K.W. Kemper, K.L. Miller, L.A. Riley, and H. Scheit, Phys. Rev. C66, 024325 (2002).
Structure of the ‘Island of Inversion’ Nucleus ³³Mg, B.V. Pritychenko, T. Glasmacher, P.D. Cottle, R.W. Ibbotson, K.W. Kemper, L.A. Riley, A. Sakharuk, H. Scheit, M. Steiner, V. Zelevinsky, Phys. Rev. C65, 061304 (2002).
0_gs⁺–>2₁⁺ Excitations in the Mirror Nuclei ³²Ar and ³²Si, P. D. Cottle, Z. Hu, B. V. Pritychenko, J. A. Church, M. Fauerbach, T. Glasmacher, R. W. Ibbotson, K. W. Kemper, L. A. Riley, H. Scheit, and M. Steiner, Phys. Rev. Lett. 88, 172502 (2002).
First Observation of an Excited State in the Neutron-Rich Nucleus ³¹Na, B.V. Pritychenko, T. Glasmacher, B.A. Brown, P.D. Cottle, R.W. Ibbotson, K.W. Kemper, L.A. Riley, H. Scheit, Phys.Rev. C63, 011305 (2001).
B(E2;0_gs⁺ ->2₁⁺) in ¹⁸Ne and isospin purity in A=18 nuclei, L.A. Riley, P.D. Cottle, M. Fauerbach, T. Glasmacher, K.W. Kemper, B. V. Pritychenko, H. Scheit, Phys. Rev. C62, 034306 (2000).
Spectroscopy of the 2₁⁺ State in ²²O and Shell Structure Near the Neutron Drip Line, P.G. Thirolf, B.V. Pritychenko, B.A. Brown, P.D. Cottle, M. Chromik, T. Glasmacher, G. Hackman, R.W. Ibbotson, K.W. Kemper, T. Otsuka, L.A. Riley, H. Scheit, Phys. Lett. 485B, 16 (2000).
Conversion electron-gamma coincidences and intrinsic reflection asymmetry in ²¹⁹Ra, L. A. Riley, P. D. Cottle, M. Fauerbach, V. S. Griffin, B. N. Guy, K. W. Kemper, G. S. Rajbaidya, and O. J. Tekyi-Mensah, Phys. Rev. C62, 021301(R) (2000).
Intermediate-energy Coulomb excitation of ¹⁹Ne, G. Hackman, Sam M. Austin, T. Glasmacher, T. Aumann, B.A. Brown, R.W. Ibbotson, K. Miller, B. Pritychenko, L.A. Riley, and E. Spears, Phys. Rev. C61, 052801(R) (2000).
Proton scattering from the unstable neutron-rich nucleus ⁴³Ar, F. Maréchal, T. Suomijärvi, Y. Blumenfeld, A. Azhari, D. Bazin, J. A. Brown, P. D. Cottle, M. Fauerbach, T. Glasmacher, S. E. Hirzebruch, J. K. Jewell, J. H. Kelley, K. W. Kemper, P. F. Mantica, D. J. Morrissey, L. A. Riley, J. A. Scarpaci, H. Scheit, and M. Steiner, Phys. Rev. C60, 064623 (1999).
Proton scattering by short lived sulfur isotopes, F. Maréchal, T. Suomijärvi, Y. Blumenfeld, A. Azhari, E. Bauge, D. Bazin, J.A. Brown, P.D. Cottle, J.P. Delaroche, M. Fauerbach, M. Girod, T. Glasmacher, S.E. Hirzebruch, J.K.Jewell, J.H. Kelley, K.W. Kemper, P.F. Mantica, D.J. Morrissey, L.A. Riley, J.A. Scarpaci, H. Scheit, and M. Steiner, Phys. Rev. C60, 034615 (1999).
Proton scattering on the radioactive nucleus ²⁰O and the 0_gs⁺ -> 2₁⁺ transition in the neutron-rich oxygen isotopes, J.K. Jewell, L.A. Riley, P.D. Cottle, K.W. Kemper, T. Glasmacher, R.W. Ibbotson, H. Scheit, M. Chromik, Y. Blumenfeld, S.E. Hirzebruch, F. Maréchal, and T. Suomijärvi, Phys. Lett. B454, 181 (1999).
Inverse Kinematics Proton Scattering on ¹⁸Ne and Mirror Symmetry in A=18 Nuclei, L.A. Riley, J.K. Jewell, P.D. Cottle, T. Glasmacher, K.W. Kemper, N. Alamanos, Y. Blumenfeld, J.A. Carr, M.J. Chromik, R.W. Ibbotson, F. Maréchal, W.E. Ormand, F. Petrovich, H. Scheit, and T. Suomijärvi, Phys. Rev. Lett. 82, 4196 (1999).
Collective behavior in ⁷⁸Rb, R.A. Kaye, L.A. Riley, G.Z. Solomon, and S.L. Tabor, Phys. Rev. C58, 3228 (1998).
Weak coupling and single-particle structure at high spin in ¹⁴³Nd, M. Fauerbach, L.A. Riley, P.D. Cottle, R.A. Kaye, and K.W. Kemper, Phys. Rev. C58, 826 (1998).
Octupole states in ¹⁹⁶Pt(p,p’ gamma), J.K. Jewell, P.D. Cottle, K.W. Kemper, and L.A. Riley, Phys. Rev. C56, 2440 (1997).
Zero degree detector for conversion electrons from a heavy-ion-induced reaction, M.P. Metlay, L.A. Riley, P.D. Cottle, J.K. Jewell, and K.W. Kemper, Nucl. Instr. Meth. A385, 112 (1997).

Conference Contributions

Proton and neutron contributions to the first 2⁺ state of ⁴²Si via inelastic scattering, Lewis A Riley, Paul Davis Cottle, Mark Spieker, Ian Conroy, Alyssa Marie Himmelreich, Sk Mustak Ali, Tobias Beck, Joseph Chung-Jung, Alex L Conley, Peter Farris, Alexandra Gade, Stephen Gillespie, Gabriel Grauvogel, Marc Hausmann, Ava M Hill, Millard G Heinze, Dennis Houlihan, Bryan Kelly, Kirby W Kemper, Jake Kosa, Blake McNulty, Shumpei Noji, Neshad Deva Pathirana, Jorge Pereira, Zarif Rahman, Dirk Weisshaar, Remco Zegers, APS Division Nuclear Physics Boston Meeting, Session GN.00005, Abstract R02.1 (2024).
Inverse-kinematics proton scattering from ^42,44S, ^41,43P, L. A. Riley, S. D. Gregory, E. B. Haldeman, B. R. Klybor, M. A. Liggett, L. M. Skiles, P.D. Cottle, K. W. Kemper, A. Volya, D. Bazin, J. Belarge, P. C. Bender, B. A. Brown, B. Elman, A. Gade, S. Lipschutz, B. Longfellow, E. Lunderberg, T. Mijatovic, J. Pereira, R. Titus, D. Weisshaar, J. C. Zamora, R. G. T. Zegers, Bull. Amer. Phys. Soc. 64, No. 12, GN.00005 (2019).
Inverse-kinematics proton scattering by ^50,52Ca, L.A. Riley, M.L. Agiorgousis, F.G. DeVone, M.T. Glowacki, B.V. Sadler, P.D. Cottle, K.W. Kemper, D.M. McPherson, T.R. Baugher, D. Bazin, M. Bowry, A. Gade, E.M. Lunderberg, S. Noji, M. Scott, D. Weisshaar, R.G.T. Zegers, Bull. Amer. Phys. Soc. 58, No. 13, JD.00007 (2013).
One-neutron knockout from ⁴⁵Cl, L. A. Riley, B. A. Hartl, K. E. Hosier, D. C. Stoken, P. D. Cottle, K. W. Kemper, P. Adrich, T.R. Baugher, D. Bazin, J. M. Cook, C. Aa. Diget, A. Gade, D. A. Garland, T. Glasmacher, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, and D. Weisshaar, Bull. Amer. Phys. Soc. 54, No. 4, 150 (2009).
One-proton knockout from ⁴⁴S and the Z = 14 subshell gap near the neutron drip line, L.A. Riley, P. Adrich, T.R. Baugher, D. Bazin, B. A. Brown, J. M. Cook, P. D. Cottle, C. AA. Diget, A. Gade, D. A. Garland, T. Glasmacher, K. E. Hosier, K. W. Kemper, A. Ratkiewicz, K. P. Siwek, J. A. Tostevin, Y. Utsuno, and D. Weisshaar, Nuclear Structure 2008, National Superconducting Cyclotron Laboratory at Michigan State University (2008).
Shell structure near ⁴²Si: one proton knockout from ⁴⁴S, L.A. Riley, T.R. Baugher, K.E. Hosier, P.D. Cottle, K.W. Kemper, P. Adrich, D. Bazin, J.M. Cook, C.A. Diget, A. Gade, D.A. Garland, T. Glasmacher, A. Ratkiewicz, K.P. Siwek, D. Weisshaar, Bull. Amer. Phys. Soc. 52, No. 9, 30 (2007).
Intermediate-energy Coulomb excitation of ⁴⁶V, ⁵⁰Mn, and ⁵⁴Co, L.A. Riley, M.J. Bojazi, J.W. Kremenak, D.C. McGlinchey, D. Bazin, A.D. Becerril, J.M. Cook, A. Gade, T. Glasmacher, W.F. Mueller, C. Vaman, P.D. Cottle, K.W. Kemper, R.R. Reynolds, B.T. Roeder, Bull. Amer. Phys. Soc.50, No. 6, 108 (2005).
Inelastic proton scattering by ⁴⁶Ar and ⁴⁴S and the N=28 shell closure, L.A. Riley, M.A. Abdelqader, T.P. Spencer, D. Bazin, C.M. Campbell, J.A. Church, D.C. Dinca, J. Enders, A. Gade, T. Glasmacher, Z. Hu, W.F. Mueller, H. Olliver, B.C. Perry, B.M Sherrill, J.R. Terry, K.W. Kemper, B.T. Roeder, S. Horibe, Bull. Amer. Phys. Soc. 48, No.8, 29 (2003).
Lifetime of the 2⁺₁ state and densities for the 0_gs⁺–>2₁⁺ transition in ¹⁸Ne, L.A. Riley, P.D. Cottle, M. Brown-Hayes, W. Cluff, J.D. Fox, N. Keeley, F.W. Letson, R.A. Kaye, K.W. Kemper, M. McEllistrem, S.L. Tabor, J.M. Thompson, D. Walker, (April 2003 APS/DNP Meeting, Philadelphia, PA), Bull. Amer. Phys. Soc. 48, No.2, 33 (2003).
The Isospin Composition of the 2⁺₁ State of ¹⁸Ne, L.A. Riley, P.D. Cottle, T. Glasmacher, K.W. Kemper, (Nuclear Structure 2000, East Lansing, MI, August 2000).
Weak Coupling and Single-particle Structure at High Spin in ¹⁴³Nd, M. Fauerbach, L.A. Riley, P.D. Cottle, R.A. Kaye, and K.W. Kemper, (April 1998 APS/DNP Meeting, Columbus, OH), Bull. Amer. Phys. Soc. 43, 1173 (1998).
M_n/M_p Measurement in Single Closed Shell Nucleus ¹⁸Ne, L.A. Riley, J.K. Jewell, P.D. Cottle, K.W. Kemper, T. Glasmacher, R.W. Ibbotson, D.J. Morrisey, H. Scheit, M. Chromik, Y. Blumenfeld, S.E. Hirzebruch, T. Suomijärvi, (April 1997 APS/DNP Meeting, Washington, DC), Bull. Amer. Phys. Soc. 42, 1143 (1997).

Invited Talks

Studying Collective Excitations of Fast Beams with a Liquid Hydrogen Target and GRETINA, GRETA Dedication Workshop, Lawrence Berkeley National Laboratory, April 2025.
Gamma-Ray Spectroscopy of Direct Reactions in a Liquid hydrogen Target with GRETINA, Gordon Research Conference on Nuclear Chemistry, Colby-Sawyer College, New London, NH, June 2017.
Disentangling neutron and proton contributions to collective excitations: proton scattering at the NSCL and FRIB, Nuclear Physics Seminar, Rutgers University, Piscataway, NJ, November 2015.
Nuclear shell structure away from stability, Physics Department Colloquium, Ball State University, Muncie, IN, April 2001.
Faith in the Future, The Sheridan Simon Memorial Lecture : Quantum Spookiness, L.A. Riley, Guilford College, Greensboro, NC, October 2000.