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Abstract

In the course of an experimental study of shape isomerism in light actinide nuclei a systematic investigation of fission barriers has been started. The complete shape of the barrier is calculated by minimizing the binding energy in a five-dimensional parameter-space. The quality of the fission barrier calculations is discussed in terms of ground state properties as the alpha decay energy and the corresponding half life. The penetrability through this fission barrier at normal as well as isomeric ground state energy is calculated in Wentzel-Kramers-Brillouin (WKB) approximation. The effective inertia is treated in a standard phenomenological approach, which has been adapted individually in order to reproduce well known ground state fission and shape isomeric decay half lives. It is found that a systematic change of the effective inertia with respect to the nuclear mass number has to be assumed in order to obtain the right penetrabilities and reasonable predictions of shape isomeric half lives in the light actinide region.

Additional information

Authors: OBERSTEDT S, JRC Geel (BE);HAMBSCH F-J, JRC Geel (BE)
Bibliographic Reference: Article : Nuclear Physics A (1996)
Record Number: 199610914 / Last updated on: 1996-09-16
Category: PUBLICATION
Original language: en
Available languages: en