Vogel, P. and Zirnbauer, M. R. (1986) Suppression of the two-neutrino double-beta decay by nuclear-structure effects. Physical Review Letters, 57 (25). pp. 3148-3151. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:VOGprl86
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The nuclear matrix element for 2ν double-beta decay is calculated within the quasiparticle random-phase approximation. It is shown that the decay matrix element passes through zero as a function of the strength gpp of the particle-particle component of the spin-isospin polarization force, neglected previously. The analysis of electron capture/β+ decay rates for semimagic neutron-deficient nuclei suggests values for gpp in the very vicinity of this zero, which gives rise to long lifetimes. The qualitative features of nuclear ββ decay are illustrated with the example of an exactly soluble model.
|Additional Information:||©1986 The American Physical Society Received 14 July 1986 It is a pleasure to thank S.E. Koonin, H.A. Weidenmüller, and A. Winther for valuable discussions. This work was supported by the U.S. Department of Energy under Contract No. DE-AT03-81ER40002, and by the National Science Foundation, under Grants No. PHY82-07332 and PHY85-05682.|
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|Deposited On:||14 Dec 2006|
|Last Modified:||26 Dec 2012 09:23|
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