Elsevier

Nuclear Physics A

Volume 601, Issue 1, 29 April 1996, Pages 69-88
Nuclear Physics A

γ-tunneling calculations for the decays of the K isomers in the Hf, W, Os region

https://doi.org/10.1016/0375-9474(96)00021-8Get rights and content

Abstract

Recent studies of the high-K isomers in the Hf, W, Os region have uncovered the existence of direct branches to the low-K rotational bands with unexpectedly large transition probabilites. The measured hindrance factors have called the validity of the K quantum number into question. In order to give a new insight to this problem, we have performed systematic calculations of the M1 and E2 partial life times of the K isomers by using a simple tunneling model in which the γ degree of freedom is taken into account. Many of the observed partial life times are reproduced by the model, but some data remain completely off the calculations. This requires further studies of the spin-orientation degree of freedom.

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    Present address: K.K. Codec, Taira 1-2-11, Miyamae-ku Kawasaki-shi, Kanagawa 216, Japan.

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