Abstract
A new -decay branch has been found from the well-known 661.659(3)-keV , min isomer in which is populated in the decay of . The new 377.9(3)-keV ray connects the isomer to the low-lying 283.5 keV, state. It is of near-pure character. The decay has a branching ratio () of . The new decay has a of 0.71(6) W.u. [], a value consistent with other “single-particle” decays in the region. The new decay branch is of topical interest, as it competes with the much-sought “two-photon” second-order electromagnetic decay from this state.
- Received 12 August 2014
- Revised 11 September 2014
DOI:https://doi.org/10.1103/PhysRevC.90.041303
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