Lifetime measurements of low-spin negative-parity levels in $^{160}\mathrm{Gd}$

Lifetime measurements of low-spin negative-parity levels in ${}^{160}{Gd}$

S. R. Lesher, C. Casarella, A. Aprahamian, L. M. Robledo, B. P. Crider, R. Ikeyama, I. R. Marsh, M. T. McEllistrem, E. E. Peters, F. M. Prados-Estévez, M. K. Smith, Z. R. Tully, J. R. Vanhoy, and S. W. Yates

Phys. Rev. C 95, 064309 – Published 12 June 2017

Abstract

${}^{160}{Gd} (n, n^{'} γ)$ experiments were performed with accelerator-produced monoenergetic neutrons. Excitation functions at neutron energies from 1.5 to 2.8 MeV aided in the placement of $γ$ rays in the level scheme and angular distributions at three neutron energies resulted in the determination of 28 excited-level lifetimes or limits in ${}^{160}{Gd}$ , including the lifetimes of several negative-parity levels attributed to octupole vibrations.

Received 1 February 2016
Revised 2 May 2017

DOI:https://doi.org/10.1103/PhysRevC.95.064309

Physics Subject Headings (PhySH)

Collective levels Collective models Electromagnetic transitions Lifetimes & widths Nucleon induced nuclear reactions

150 ≤ A ≤ 189

Nuclear Physics

Authors & Affiliations

S. R. Lesher^1,2,*, C. Casarella², A. Aprahamian², L. M. Robledo³, B. P. Crider^4,†, R. Ikeyama¹, I. R. Marsh¹, M. T. McEllistrem⁴, E. E. Peters⁵, F. M. Prados-Estévez^4,5, M. K. Smith^2,†, Z. R. Tully¹, J. R. Vanhoy⁶, and S. W. Yates^4,5

¹Department of Physics, University of Wisconsin–La Crosse, La Crosse, Wisconsin 54601-3742, USA
²Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
³Dep. Física Teórica (Módulo 15), Universidad Autónoma de Madrid, E-28049 Madrid, Spain
⁴Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055, USA
⁵Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055, USA
⁶Department of Physics, United States Naval Academy, Annapolis, Maryland 21402, USA

^*slesher@uwlax.edu
^†Present address: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.

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Vol. 95, Iss. 6 — June 2017

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Physical Review C

covering nuclear physics

Lifetime measurements of low-spin negative-parity levels in ${}^{160}{Gd}$

S. R. Lesher, C. Casarella, A. Aprahamian, L. M. Robledo, B. P. Crider, R. Ikeyama, I. R. Marsh, M. T. McEllistrem, E. E. Peters, F. M. Prados-Estévez, M. K. Smith, Z. R. Tully, J. R. Vanhoy, and S. W. Yates

Phys. Rev. C 95, 064309 – Published 12 June 2017

Abstract

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Physical Review C

covering nuclear physics

Lifetime measurements of low-spin negative-parity levels in Gd160

S. R. Lesher, C. Casarella, A. Aprahamian, L. M. Robledo, B. P. Crider, R. Ikeyama, I. R. Marsh, M. T. McEllistrem, E. E. Peters, F. M. Prados-Estévez, M. K. Smith, Z. R. Tully, J. R. Vanhoy, and S. W. Yates

Phys. Rev. C 95, 064309 – Published 12 June 2017

Abstract

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Lifetime measurements of low-spin negative-parity levels in ${}^{160}{Gd}$