Abstract
The combined data of two Coulomb excitation experiments has verified the purely electromagnetic population of the , and rotational bands in via -forbidden transitions, quantifying the breakdown of the -selection rule with increasing spin in the low- bands. The γ-, , and bands were extended, and four new states in a rotational band were tentatively assigned to a previously known band. The quasiparticle structure of the ( ns) and ( s) isomer bands were evaluated, showing that the gyromagnetic ratios of the isomer band are consistent with a pure structure. The isomer band at 1147 keV and the second band at 1479 keV, thought to be predominantly and , respectively, are mixed to a degree approaching the strong-mixing limit. Based on measured matrix elements, it was shown that heavy-ion bombardment could depopulate the isomer at the % level, although no states were found that would mediate photodeexcitation of the isomer via low-energy x-ray absorption.
28 More- Received 16 October 2006
DOI:https://doi.org/10.1103/PhysRevC.75.034308
©2007 American Physical Society