Recoil- β tagging study of the N = Z nucleus 66As

P. Ruotsalainen, C. Scholey, R. Julin, K. Hauschild, K. Kaneko, B.S. Nara Singh, R. Wadsworth, D.G. Jenkins, T.S. Brock, P.T. Greenlees, J. Henderson, U. Jakobsson, P. Jones, S. Juutinen, S. Ketelhut, M. Leino, N.M. Lumley, P.J.R. Mason, P. Nieminen, M. NymanI. Paterson, P. Peura, M.G. Procter, P. Rahkila, J. Sarén, J. Sorri, J. Uusitalo

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14 Citations (Scopus)

Abstract

An in-beam study has been performed to further investigate the known isomeric decays and to identify T=1 excited states in the medium-heavy N=Z=33 nucleus 66As. The fusion-evaporation reaction 40Ca(28Si,pn)66As was employed at beam energies of 75 and 83 MeV. The half-lives and ordering of two known isomeric states in 66As have been determined with improved accuracy. In addition, several prompt γ-ray transitions from excited states, both bypassing and decaying to the isomeric states in 66As, have been observed. Most importantly, candidates for the 4+→2+ and 6+→4+ transitions in the T=1 band have been identified. The results are compared with shell-model calculations using the modern JUN45 interaction in the pf5/2g9/2 model space.
Original languageEnglish
Article number024320
JournalPhysical Review C
Volume88
Issue number2
DOIs
Publication statusPublished - 21 Aug 2013
Externally publishedYes

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