Abstract
The nucleus has been produced at the LISOL facility and its decay to has been observed. In parallel, the nucleus has been produced at the ISOLDE facility. A new third -decaying isomeric state in has been identified, partly with the aid of the in-source laser spectroscopy method. Its measured half-life is . In addition, two isomeric transitions in have been observed at energies of 101.1(3) and , and it allowed the relative placement of the three isomeric states and their tentative spin and parity assignments. The new isomer was found to be weakly populated in the decay of . It allowed the construction of the decay scheme. Furthermore, the decay of the three isomers to has been measured and their decay schemes are presented. The decay to the isomeric states in and their subsequent isomeric decay and decay to are discussed within the extreme shell-model picture of two valence nucleons outside the semidouble magic core and it yields satisfactory results. Large-basis shell-model calculations using as the core and a realistic effective interaction support rather well the suggested interpretation.
1 More- Received 20 November 2003
DOI:https://doi.org/10.1103/PhysRevC.69.034313
©2004 American Physical Society