Abstract
A detailed spectroscopic study of the neutron-deficient isotope and the daughter of its decay, , has been performed in the complete fusion reaction at the velocity filter SHIP (GSI). The mass excess, excitation energy, and decay scheme of the isomeric 1.40(3) ms, intruder state in have been established for the first time. These results solve a long-standing puzzle of the unrealistically large reduced -decay width of this isomer. Based on this, the previously unknown masses of the long-lived isomeric states in and have been derived. In turn, it now allows the excitation energies of previously identified bands in and to be deduced and compared with theoretical predictions. First measurements of -decay branching ratios for and are also reported.
- Received 1 June 2009
DOI:https://doi.org/10.1103/PhysRevC.80.024302
©2009 American Physical Society