Abstract
Using resonant laser ionization, -decay studies, and for the first time mass measurements, three -decaying states have been unambiguously identified in . A mass excess of and a half-life of 44.5(2) s for the ground state have been determined. The level energies of the isomer at 101.1(3) keV with and the isomer at 242.4(3) keV with are confirmed by high-precision mass measurements. The low-lying levels of populated in the decay of and in transfer reactions compare well with large-scale shell-model calculations, and the wave functions appear to be dominated by one proton–one neutron configurations outside the closed shell and subshell. This does not apply to the state at 1980 keV which exhibits a particular feeding and deexcitation pattern not reproduced by the shell-model calculations.
- Received 12 November 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.112501
©2004 American Physical Society