Recoil-beta tagging study of the N = Z nucleus As-66
- Ruotsalainen, P.
- Scholey, C.
- Julin, R.
- Hauschild, K.
- Kaneko, K.
- Singh, B.S.N.
- Wadsworth, R.
- G. Jenkins, D.
- S. Brock, T.
- T. Greenlees, P.
- Henderson, J.
- Jakobsson, U.
- Jones, P.
- Juutinen, S.
- Ketelhut, S.
- Leino, M.
- M. Lumley, N.
- J. R. Mason, P.
- Nieminen, P.
- Nyman, M.
- Paterson, I.
- Peura, P.
- G. Procter, M.
- Rahkila, P.
- Saren, J.
- Sorri, J.
- Uusitalo, J.
DOIAbstract
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...
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