Recoil-beta tagging study of the N=Z nucleus 66As
Ruotsalainen, P., Scholey, C., Julin, R., Hauschild, K., Kaneko, K., Singh, B. S. N., . . . Uusitalo, J. (2013). Recoil-beta tagging study of the N=Z nucleus 66As. Physical Review C, 88 (2), 024320. doi:10.1103/PhysRevC.88.024320
Published inPhysical Review C
© 2013 American Physical Society. Published in this repository with the kind permission of the publisher.
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.