Original scientific paper

Non-collapsing quasiparticle random phase approximation for nuclear double-beta decay

F. Krmpotić ; Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 67, 1900 La Plata, Argentina
A. Mariano ; Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 67, 1900 La Plata, Argentina
E. J. V. De Passos ; Instituto de Física, Universidade de Sao Paulo, C.P. 20516, 01498 Sâo Paulo, Brasil
A. F. R. De Toledo Piza ; Instituto de Física, Universidade de Sao Paulo, C.P. 20516, 01498 Sâo Paulo, Brasil
T. T. S. Kuo ; Physics Department, State University of New York at Stony Brook, Stony Brook, NY 11794-3800, USA

Abstract

We show how the longstanding problem of the collapse of the charge–exchange QRPA near the physical value of the force strength can be circumvented. This is done by including the effect of ground state correlations into the QRPA equations of motion. The corresponding formalism, called renormalized QRPA, is briefly outlined and its consequences are discussed in the framework of a schematic model for the two-neutrino double beta decay in the 100Mo → 100Ru system. The question of the conservation of the Ikeda sum rule is also addressed within the new formalism.

Keywords

Hrčak ID:

303487

URI

https://hrcak.srce.hr/303487

Publication date:

5.5.1996.

Article data in other languages: croatian

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