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A [Formula Presented] strongly coupled rotational band, which is built upon a 23 ns isomeric state, has been established in [Formula Presented] The single-particle configuration of the band has been determined from the in-band to out-of-band branching ratios and associated [Formula Presented] values. The [Formula Presented]-ray decay of the [Formula Presented] isomeric state proceeds through a [Formula Presented] intrinsic state, in accordance with the K-selection rule. A complex array of delayed [Formula Presented]-ray transitions have been observed to link this [Formula Presented] intrinsic bandhead state into the yrast states. In particular, a new [Formula Presented] 1141 keV, [Formula Presented] transition links the [Formula Presented] isomeric state directly to the ground-state band. The [Formula Presented]-ray reduced hindrance factor for this [Formula Presented] decay in [Formula Presented] is the smallest [Formula Presented] transition observed in the Hf nuclei. However, its value is consistent with that expected on the basis of the increased Coriolis mixing which occurs in the lighter Hf isotopes. © 1999 The American Physical Society.

Original publication




Journal article


Physical review c - nuclear physics

Publication Date