How to measure the spreading width for decay of superdeformed nuclei

Details How to measure the spreading width for decay of superdeformed nuclei How to measure the spreading width for decay of superdeformed nuclei

2003-04-04

arxiv.org/abs/nucl-th/0304014v1

Phys.Rev.Lett. 91 (2003) 102502

Physics

Nuclear Physics

Nuclear Theory

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.91.102502

A new expression for the branching ratio for the decay via the E1 process in the normal-deformed band of superdeformed nuclei is given within a simple two-level model. Using this expression, the spreading or tunneling width Gamma^downarrow for superdeformed decay can be expressed entirely in terms of experimentally known quantities. We show how to determine the tunneling matrix element V from the measured value of Gamma^downarrow and a statistical model of the energy levels. The accuracy of the two-level approximation is verified by considering the effects of the other normal-deformed states.

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