Abstract
A new level scheme of has been determined. This nucleus was populated following the decay of at ISOLDE, CERN. The proposed level scheme is significantly different compared to the previously reported one and contains 26 levels up to 3.4 MeV in excitation energy. The present study establishes that the previously identified 1.9-s -decaying isomer is the ground state of and the 1.3-s -decaying 3 isomer lies at an excitation energy of 22.4 keV. A new isomeric level was identified at 707.8 keV and its half-life was measured to be 18.3(5) ns, allowing the 685.4-keV transition de-exciting this state to be assigned an multipolarity. The newly measured spectroscopic observables are compared with shell-model calculations using the jj44bpn and JUN45 interactions.
- Received 27 May 2014
DOI:https://doi.org/10.1103/PhysRevC.90.014320
©2014 American Physical Society