Steven W. Yates | 糖心vlog官方入口 College of Arts & Sciences

Steven W. Yates

Professor of 糖心vlog官方入口

Professor of Physics and Astronomy

Arts & Sciences Distinguished Professor

Contact Information

yates@uky.edu

Research Interests

Nuclear 糖心vlog官方入口 and Nuclear Structure

Affiliations

糖心vlog官方入口
Physics & Astronomy
Radionuclear
Nuclear Physics

Curriculum Vitae (CV)

Research

For many years it has been recognized that nuclei in certain mass regions exhibit stable deformations, while those in other regions are essentially spherical. The shell model, an independent-particle model, has been used to explain the properties of spherical nuclei by assigning orbitals to each of the neutrons and protons of the nucleus. These orbitals are then filled in order of increasing energy, similar to the "aufbau" process in atoms. With this approach, it is possible to understand the exceptional stability of nuclei containing closed shells (or magic numbers), i.e., nuclei composed of 2, 8, 20, 28, 50, 82, and 126 neutrons or protons. In nuclei at or near closed shells, we are examining multiphonon vibrational excitations of quadrupole and octupole types.

Away from these closed shells, collective nuclear motions dominate over independent-particle modes. The best evidence for collective excitations is the rotational nuclear level structure observed for nuclei of the rare earth and actinide regions. Sequences of low-lying states closely obeying the quantum relationship for a rigid rotor occur and are reminiscent of the rotational levels known for diatomic molecules. For such open-shell nuclei, ample evidence has long been available to confirm that these nuclei have an intrinsic deformed shape. In measurements on deformed nuclei, we have sought to identify two-phonon states, to characterize "scissors mode" and "mixed-symmetry" excitations in which the neutrons and protons oscillate independently, and to search for other exotic modes.

In addition to searching for new degrees of freedom in nuclei, we have focussed on the complex transition between deformed and spherical shapes in our studies at the at the 糖心vlog官方入口. We have extensively utilized the inelastic neutron scattering (INS) reaction and gamma-ray emission spectroscopy to examine many nuclei. INS, coupled with detection of the de-exciting gamma rays, is distinctly superior to other nuclear reactions for the study of low-lying, low-spin nuclear states. With this method, we can obtain excellent sensitivity for observing weakly excited states, and the INS reaction is not restricted by spin and parity selection rules. We have developed methods for measuring short nuclear lifetimes with the Doppler-shift attenuation method, and gamma-gamma coincidence measurements are now performed routinely. We are currently exploiting these unique advantages to examine a variety of structural features of nuclei and to search for new, exotic nuclear modes.

Awards and Honors

1972-1973 Procter and Gamble Fellow
1981 糖心vlog官方入口 (UK) Research Foundation Award
1983 Student Affiliates of the American Chemical Society (SAACS) Teacher of the Year
1985 Chairman, Lexington Section of the American Chemical Society (ACS)
1987-1989 Councilor, Lexington Section of ACS
1992-1993 University Research Professor, UK
1992 Chancellor's Award for Outstanding Teaching, UK
1992 Chairman, Division of Nuclear 糖心vlog官方入口 and Technology, ACS
1993-1994 Distinguished Professor of the College of Arts and Sciences, UK
1994 William B. Sturgill Award for Outstanding Contributions to Graduate Education, UK
1995-2003 Councilor, Division of Nuclear 糖心vlog官方入口 and Technology, ACS
2002 Fellow of the International Union of Pure and Applied 糖心vlog官方入口 (IUPAC)
2004-present Professor of Physics and Astronomy, UK
2005-2009 Chair, Department of 糖心vlog官方入口, UK
2006 Glenn T. Seaborg Award for Nuclear 糖心vlog官方入口, ACS
2008-2013 Councilor, Division of Nuclear 糖心vlog官方入口 and Technology, ACS
2008-present Arts and Sciences Distinguished Professor, UK
2009 Fellow of the American Chemical Society, Member of the Inaugural Class of ACS Fellows
2010 Award in Recognition of Fifteen Years of Service on the Council of the American Chemical Society
2012 Southeastern Conference Academic Consortium (SECAC) Faculty Achievement Award, Inaugural UK Representative
2014-2015 Interim Chair, Department of 糖心vlog官方入口, UK
2016 Fellow of the American Physical Society
2018 W. Frank Kinard Distinguished Service Award, Division of Nuclear 糖心vlog官方入口 and Technology, ACS
2022 Distinguished Service or Engagement Award, UK College of Arts & Sciences

Visiting Appointments

NSF Undergraduate Research Fellow, Lawrence Berkeley Laboratory, summer 1967
Visiting Scientist, Oak Ridge National Laboratory, summer 1976
Gastwissenschaftler, Kernforschungsanlage Juelich, Germany, 1981-1982
Participating Guest, Lawrence Livermore National Laboratory, 1984-2005
Visiting Scientist, Lawrence Livermore National Laboratory, 1989-1990
Guest Scientist and Visiting Professor, Los Alamos National Laboratory, 1997, 1998
Visiting Scientist, TRIUMF, University of British Columbia, Canada, 2009-2010

Graduate Training

Nuclear 糖心vlog官方入口 and Radiochemistry

Selected Publications

Selected Publications:

L.J. Evitts, A.B. Garnsworthy, T. Kib茅di, J. Smallcombe, M.W. Reed, B.A. Brown, A.E. Stuchbery, G.J. Lane, T.K. Eriksen, A. Akber, B. Alshahrani, M. de Vries, M.S.M. Gerathy, J.D. Holt, B.Q. Lee, B.P. McCormick, A.J. Mitchell, M. Moukaddam, S. Mukhopadhyay, N. Palalani, T. Palazzo, E.E. Peters, A.P.D. Ramirez, S.R. Stroberg, T. Tornyi, and S.W. Yates, 鈥淚dentification of significant E0 strength in the 2₂⁺ 鈫� 2₁⁺ transitions of ^58,60,62Ni,鈥� Phys. Lett. B 779, 396-401 (2018).
J.R. Vanhoy, S.H. Liu, S.F. Hicks, B.M. Combs, B.P. Crider, A.J. French, E.A. Garza, T. Harrison, S.L. Henderson, T.J. Howard, M.T. McEllistrem, S. Nigam, R.L. Pecha, E.E. Peters, F.M. Prados-Est茅vez, A.P.D. Ramirez, B.G. Rice, T.J. Ross, Z.C. Santonil, L.C. Sidwell, J.L. Steves, B.K. Thompson, and S.W. Yates, 鈥�⁵⁴Fe Neutron Elastic and Inelastic Scattering Differential Cross Sections from 2-6 MeV,鈥� Nucl. Phys. A972, 107鈥�120 (2018).
P. E. Garrett, J. L. Wood, and S. W. Yates, 鈥淐ritical Insights into Nuclear Collectivity from Complementary Nuclear Spectroscopic Methods,鈥� Phys. Scr. 93, 063001 (2018).
E.E. Peters, P. Van Isacker, A. Chakraborty, B.P. Crider, A. Kumar, S.H. Liu, M.T. McEllistrem, C.V. Mehl, F.M. Prados Est茅vez, T.J. Ross, J.L. Wood, and S.W. Yates, 鈥淪eniority structure of¹³⁶Xe₈₂鈥�, Phys. Rev. C 98, 034302 (2018).
M. Moukaddam, J. Smallcombe, A.B. Garnsworthy, C. Andreoiu, G.C. Ball, J. Berean-Dutcher, D. Bishop, C. Bolton, R. Caballero-Folch, M. Constable, D.S. Cross, T.E. Drake, R. Dunlop, L.J. Evitts, P.E. Garrett, S. Georges, G. Hackman, S. Hallam, J. Henderson, R. Henderson R. Kr眉cken, L. Kurchaninov, A. Kurkjian, B. Olaizola, P. Lu, J. Park, E.E. Peters, J.L. Pore, E.T. Rand, P. Ruotsalainen, J.K. Smith, D. Southall, C.E. Svensson, M. Williams, S.W. Yates, and T. Zidar, 鈥淚n-beam conversion electron spectroscopy with the SPICE detector,鈥� Nucl. Instrum. Meth. Phys. Res. A 905, 180-187 (2018).
J. Smallcombe, J. Berean-Dutcher, M. Moukaddam, A.B. Garnsworthy, C. Andreoiu, R. Caballero-Folch, T.E. Drake, L.J. Evitts, G. Hackman, J. Henderson, A. Kurkjian, B. Olaizola, E.E. Peters, D. Southall, P. Ruotsalainen, C.E. Svensson, M. Wiens, S.W. Yates, and T. Zidar, 鈥淓0 transition strengths in ¹¹⁰Pd,鈥� Eur. Phys. J. A 54, 165 (2018).
A.B. Garnsworthy, C.E. Svensson, M. Bowry, R. Dunlop, A.D. MacLean, B. Olaizola, J.K. Smith, F.A. Ali, C. Andreoiu, J.E. Ash, W.H. Ashfield, G.C. Ball, T. Ballast, C. Bartlett, Z. Beadle, P.C. Bender, N. Bernier, S. Bhattacharjee, H. Bidaman, V. Bildstein, D. Bishop, P. Boubel, R. Braid, D. Brennan, T. Bruhn, C. Burbadge, A. Cheeseman, R. Churchman, S. Ciccone, R. Caballero-Folch, D.S. Cross, S. Cruz, B. Davids, A. Diaz Varela, I. Dillmann, M.R. Dunlop, L.J. Evitts, F. Garcia, P.E. Garrett, S. Georges, S. Gillespie, R. Gudapati, G. Hackman, B. Hadinia, S. Hallam, J. Henderson, S.V. Ilyushkin, B. Jigmeddorj, A.I. Kilic, D. Kisliuk, R. Kokke, K. Kuhn, R. Kruecken, M. Kuwabara, A.T. Laffoley, R. Lafleur, K.G. Leach, J.R. Leslie, Y. Linn, C. Lim, E. MacConnachie, A.R. Mathews, E. McGee, J. Measures, D. Miller, W.J. Mills, W. Moore, D. Morris, L.N. Morrison, M. Moukaddam, C.R. Natzke, K. Ortner, E. Padilla-Rodal, O. Paetkau, J. Park, H.P. Patel, C.J. Pearson, E. Peters, E.E. Peters, J.L. Pore, A.J. Radich, M.M. Rajabali, E.T. Rand, U. Rizwan, P. Ruotsalainen, Y. Saito, F. Sarazin, B. Shaw, J. Smallcombe, D. Southall, K. Starosta, M. Ticu, E. Timakova, J. Turko, R. Umashankar, C. Unsworth, Z.M. Wang, K. Whitmore, S. Wong, S.W. Yates, E.F. Zganjar, and T. Zidar, 鈥� The GRIFFIN Facility for Decay-Spectroscopy Studies at TRIUMF-ISAC,鈥� Nucl. Instrum. Meth. Phys. Res. A 918, 9-29 (2018).
S. Mukhopadhyay, B. P. Crider, B. A. Brown, A. Chakraborty, A. Kumar, M. T. McEllistrem, E. E. Peters, F. M. Prados-Est茅vez, and S. W. Yates, 鈥淚nelastic Neutron Scattering Studies of ⁷⁶Se,鈥� Phys. Rev. C 99, 014313 (2019).
C.M. Petrache, J.-M. R茅gis, C. Andreoiu, M. Spieker, C. Michelagnoli, P.E. Garrett, A. Astier, E. Dupont, F. H. Garcia, S. Guo, G. H盲fner, V. Karayonchev, Y.-H. Kim, L. Knaa, U. K枚ster, B.F. Lv, P. Mutti, K. Ortner, S. Prill, N. Saed-Samii, W. Urban, J.R. Vanhoy, K. Whitmore, J. Wisniewski, S.W. Yates,and A. Zilges, 鈥淐ollectivity of the 2p 潭 2h proton intruder band of ¹¹⁶Sn, Phys. Rev. C 99, 024303 (2019).
L.J. Evitts, A.B. Garnsworthy, T. Kib茅di, J. Smallcombe, M.W. Reed, A.E. Stuchbery, G.J. Lane, T.K. Eriksen, A. Akber, B. Alshahrani, B.A. Brown, M. de Vries, M.S.M. Gerathy, J.D. Holt, B.Q. Lee, B.P. McCormick, A.J. Mitchell, M. Moukaddam, S. Mukhopadhyay, N. Palalani, T. Palazzo, E.E. Peters, A.P.D. Ramirez, S.R. Stroberg, T. Tornyi, and S.W. Yates, 鈥淓0 transition strength in stable Ni isotopes,鈥� Phys. Rev. C 99, 024306 (2019).
E. E. Peters, A. E. Stuchbery, A. Chakraborty, B. P. Crider, S. F. Ashley, A. Kumar, M. T. McEllistrem, F. M. Prados-Est茅vez, and S. W. Yates, 鈥淓merging collectivity from the nuclear structure of ¹³²Xe: Inelastic neutron scattering studies and shell-model calculations, Phys. Rev. C 99, 064321 (2019).
J. Heideman, D. P茅rez-Loureiro, R. Grzywacz, C.R. Thornsberry, J. Chan, L.H. Heilbronn, S.K. Neupane, K. Schmitt, , M.M. Rajabali, A.R. Engelhardt, C.W. Howell, L.D. Mostella, J.S. Owens, S.C. Shadrick, E.E. Peters, A.P.D. Ramirez, S.W. Yates, and K. Vaigneur, Conceptual design and first results for a neutron detector with interaction localization capabilities,鈥� Nucl. Instrum. Meth. Phys. Res. A 946, 162528 (2019).
P.E. Garrett, T.R. Rodr铆guez, A. Diaz Varela, K.L. Green, J. Bangay, A. Finlay, R.A.E. Austin, G.C. Ball, D.S. Bandyopadhyay, V. Bildstein, S. Colosimo, D.S. Cross, G.A. Demand, P. Finlay, A.B. Garnsworthy, G.F. Grinyer, G. Hackman, B. Jigmeddorj, J. Jolie, W.D. Kulp, K.G. Leach, A.C. Morton, J.N. Orce, C.J. Pearson, A.A. Phillips, A.J. Radich, E.T. Rand, M.A. Schumaker, C.E. Svensson, C. Sumithrarachchi, S. Triambak, N. Warr, J. Wong, J.L. Wood, and S.W. Yates, 鈥淢ultiple Shape Coexistence in ^110,112Cd,鈥� Phys. Rev. Lett. 123, 142502 (2019).
P.E. Garrett, T.R. Rodr铆guez, A. Diaz Varela, K.L. Green, J. Bangay, A. Finlay, R.A.E. Austin, G.C. Ball, D.S. Bandyopadhyay, V. Bildstein, S. Colosimo, D.S. Cross, G.A. Demand, P. Finlay, A.B. Garnsworthy, G.F. Grinyer, G. Hackman, B. Jigmeddorj, J. Jolie, W.D. Kulp, K.G. Leach, A.C. Morton, J.N. Orce, C.J. Pearson, A.A. Phillips, A.J. Radich, E.T. Rand, M.A. Schumaker, C.E. Svensson, C. Sumithrarachchi, S. Triambak, N. Warr, J. Wong, J.L. Wood, and S.W. Yates, 鈥淪hape Coexistence and multiparticle-multihole structures in ^110,112Cd, Phys. Rev. C 101, 044302 (2020).
J. Sinclair, M. Scheck, S. W. Finch, Krishichayan, U. Gayer, W. Tornow, G. Battaglio, T. Beck, R. Chapman, M. M. R. Chishti, C. Fransen, R. Gonzales, E. Hoemann, J. Isaak, R. V. F. Janssens, D. A. Jaroszynski, S. Johnson, M. D. Jones, J. M. Keatings, N. Kelly, J. Kleemann, D. Little, B. L枚her, K. R. Mashtakov, M. M眉scher, D. O鈥橠onnell, O. Papst, E. E. Peters, D. Savran, P. Schilling, R. Schwengner, P. Spagnoletti, M. Spieker, V. Werner, J. Wilhemy, O. Wieland, S. W. Yates, and A. Zilges, 鈥淔irm spin and parity assignment for high-lying low-spin levels in stable Si isotopes,鈥� Eur. Phys. J. A 56, 105 (2020).
J.K. Smith, A.B. Garnsworthy, J.L. Pore, C. Andreoiu, A.D. MacLean, A. Chester, Z. Beadle, G.C. Ball, P.C. Bender, V. Bildstein, R. Braid, A. Diaz Varela, R. Dunlop, L.J. Evitts, P.E. Garrett, G. Hackman, S.V. Ilyushkin, B. Jigmeddorj, K. Kuhn, A.T. La铿€oley, K.G. Leach, D. Miller, W.J. Mills, W. Moore, M. Moukaddam, B. Olaizola, E.E. Peters, A.J. Radich, E.T. Rand, F. Sarazin, C.E. Svensson, S.J. Williams,and S.W. Yates, 鈥淪pectroscopic study of ⁴⁷Ca from the 尾^鈭� decay of ⁴⁷K,鈥� Phys. Rev. C 102, 054314 (2020).
S.F. Hicks, A.E. Stuchbery, T.H. Churchill, D. Bandyopadhyay, B.R. Champine, B.J. Coombes, C.M. Davoren, J.C. Ellis, W.M. Faulkner, S.R. Lesher, J.M. Mueller, S. Mukhopadhyay, J.N. Orce, M.D. Skubis, J.R. Vanhoy, and S.W. Yates, 鈥淣uclear structure of ¹³⁰Te from inelastic neutron scattering and shell model analysis,鈥� Phys. Rev. C 105, 024329 (2022).
A.P.D. Ramirez, E.E. Peters, J.R. Vanhoy, S.F. Hick, L.A. Alasagas, D.K. Alcorn-Dominguez, S.T. Block, S.T. Byrd, E.A. Chouinard, B.M. Combs, B.P. Crider, E.C. Derdyn, L. Downes, J.A. Erlanson, S.E. Evans, A.J. French, E.A. Garza, J. Girgis, T.D. Harrison, S.L. Henderson, T.J. Howard, D.T. Jackson, L.J. Kersting, A. Kumar, S.H. Liu, C.J. Lueck, E.M. Lyons, P.J. McDonough, M.T. McEllistrem, T.J. Morin, S. Mukhopadhyay, T.A. Nguyen, M. Nickel, S. Nigam, R.L. Pecha, , J. Potter, F.M. Prados-Est茅vez, B.G. Rice, T.J. Ross, Z.C. Santonil, J. Schneiderjan, L.C. Sidwell, A.J. Sigillito, J.L. Steves, B.K. Thompson, D.W. Watts, Y. Xiao, and S.W. Yates, 鈥淣eutron Elastic and Inelastic Scattering Differential Cross Sections on Carbon,鈥� Nucl. Phys. A 1023, 122446 (2022).
A.P.D. Ramirez, E.E. Peters, S. Mukhopahyay, M.T. McEllistrem, S.W. Yates, E.C. Derdeyn, S.F. Hicks, E.M. Lyons, T.J. Morin, and J.R. Vanhoy, 鈥淣eutron elastic and inelastic cross section measurements on Silicon from 0.8鈭�8 MeV鈥�, Nucl. Phys. A 1024, 122474 (2022).