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

P. Ruotsalainen C. Scholey R. Julin K. Hauschild 1 K. Kaneko B.S.N. 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. Nyman I. Paterson P. Peura M. G. Procter P. Rahkila J. Saren J. Sorri J. Uusitalo 
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609
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 As-66. The fusion-evaporation reaction Ca-40(Si-28,pn)As-66 was employed at beam energies of 75 and 83 MeV. The half-lives and ordering of two known isomeric states in As-66 have been determined with improved accuracy. In addition, several prompt gamma-ray transitions from excited states, both bypassing and decaying to the isomeric states in As-66, 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 pf(5/2)g(9/2) model space.
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Submitted on : Monday, December 2, 2013 - 10:29:44 AM
Last modification on : Sunday, June 26, 2022 - 12:00:13 PM

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P. Ruotsalainen, C. Scholey, R. Julin, K. Hauschild, K. Kaneko, et al.. Recoil-beta tagging study of the N = Z nucleus As-66. Physical Review C, American Physical Society, 2013, 88, pp.024320. ⟨10.1103/PhysRevC.88.024320⟩. ⟨in2p3-00912442⟩



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