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

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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Contributor : Christine Hadrossek <>
Submitted on : Monday, December 2, 2013 - 10:29:44 AM
Last modification on : Wednesday, September 16, 2020 - 5:43:23 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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