Spectroscopy of Gd153 and Gd157 using the (p,dγ) reaction

T. J. Ross, R. O. Hughes, J. M. Allmond, C. W. Beausang, C. T. Angell, M. S. Basunia, D. L. Bleuel, J. T. Harke, R. J. Casperson, J. E. Escher, P. Fallon, R. Hatarik, J. Munson, S. Paschalis, M. Petri, L. W. Phair, J. J. Ressler, and N. D. Scielzo
Phys. Rev. C 90, 044323 – Published 31 October 2014

Abstract

Low-spin single quasineutron levels in Gd153 and Gd157 have been studied following the Gd154(p,dγ)Gd153 and Gd158(p,dγ)Gd157 reactions. A combined Si telescope and high-purity germanium array was utilized, allowing dγ and dγγ coincidence measurements. Almost all of the established low-excitation-energy, low-spin structures were confirmed in both Gd153 and Gd157. Several new levels and numerous new γ rays are observed in both nuclei, particularly for Ex1 MeV. Residual effects of a neutron subshell closure at N=64 are observed in the form of a large excitation energy gap in the single quasineutron level schemes.

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  • Received 26 April 2014

DOI:https://doi.org/10.1103/PhysRevC.90.044323

©2014 American Physical Society

Authors & Affiliations

T. J. Ross1,2,3, R. O. Hughes1,*, J. M. Allmond4, C. W. Beausang1,†, C. T. Angell5,‡, M. S. Basunia6, D. L. Bleuel7, J. T. Harke7, R. J. Casperson7, J. E. Escher7, P. Fallon6, R. Hatarik6, J. Munson5, S. Paschalis6,§, M. Petri6,§, L. W. Phair6, J. J. Ressler7, and N. D. Scielzo7

  • 1Department of Physics, University of Richmond, Richmond, Virginia 23173, USA
  • 2Department of Physics, University of Surrey, Guildford, Surrey GU2 7JL, United Kingdom
  • 3Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
  • 4JINPA, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 5Department of Nuclear Engineering, University of California, Berkeley, California 94720, USA
  • 6Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 7Lawrence Livermore National Laboratory, Livermore, California 94551, USA

  • *Current address: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
  • Corresponding author: cbeausan@richmond.edu
  • Current address: Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
  • §Current address: IKP, TU Darmstadt, 64289 Darmstadt, Germany.

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Issue

Vol. 90, Iss. 4 — October 2014

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