Abstract
+assignment. The in-band branching ratios and multipole mixing ratios were found to be consistent with significant prolate deformation, as found in other N = 42 isotones. The bands are particularly similar to the isotone 81 Y. A projected shell model analysis has been performed which provides good reproduction of the features of both bands. The calculations indicate the nucleus to be nearly axially symmetric. 82,83 Nb may be the heaviest nuclei in the A ∼ 80 region with large deformation. The deformation is predicted to fall in heavier systems approaching 100 Sn. The conditions appear to be right for the occurrence of K isomers.
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