Spectroscopy of Gd 153 and Gd 157 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. Burke, R. J. Casperson, J. E. Escher, P. Fallon, R. Hatarik, J. Munson, S. Paschalis, M. Petri, L. W. Phair, J. J. Ressler, N. D. Scielzo

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Abstract

Low-spin single quasineutron levels in Gd153 and Gd157 have been studied following the Gd154(p,d-γ)Gd153 and Gd158(p,d-γ)Gd157 reactions. A combined Si telescope and high-purity germanium array was utilized, allowing d-γ and d-γ-γ 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 Ex≥1 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.

Original languageEnglish
Article number044323
JournalPhysical Review C - Nuclear Physics
Volume90
Issue number4
DOIs
StatePublished - Oct 31 2014

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