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Suppression of the two-neutrino double-beta decay by nuclear-structure effects

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. doi:10.1103/PhysRevLett.57.3148.

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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.

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Vogel, P.0000-0003-0587-5466
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.
Issue or Number:25
Record Number:CaltechAUTHORS:VOGprl86
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6594
Deposited By: Archive Administrator
Deposited On:14 Dec 2006
Last Modified:08 Nov 2021 20:35

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