Running sums for 2{nu}{beta}{beta}-decay matrix elements within the quasiparticle random-phase approximation with account for deformation

Journal Article · Mon Mar 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.037303· OSTI ID:21386723

Dongliang, Fang; Faessler, Amand; Rodin, Vadim; Simkovic, Fedor ^[1]; Yousef, Mohamed Saleh ^[2]

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1. Institute fuer Theoretische Physik der Universitaet Tuebingen, D-72076 Tuebingen (Germany)
2. Department of Physics, University of Cairo, Cairo (Egypt)

The 2{nu}{beta}{beta}-decay running sums for {sup 76}Ge and {sup 150}Nd nuclei are calculated within a QRPA approach with account for deformation. A realistic nucleon-nucleon residual interaction based on the Brueckner G matrix (for the Bonn CD force) is used. The influence of different model parameters on the functional behavior of the running sums is studied. It is found that the parameter g{sub pp} renormalizing the G matrix in the QRPA particle-particle channel is responsible for a qualitative change in behavior of the running sums at higher excitation energies. For realistic values of g{sub pp} a significant negative contribution to the total 2{nu}{beta}{beta}-decay matrix element is found to come from the energy region of the giant Gamow-Teller resonance. This behavior agrees with results of other authors.

• OSTI ID: 21386723
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
BARYONS
BETA DECAY
BETA-MINUS DECAY
CALCULATION METHODS
DECAY
DEFORMATION
DOUBLE BETA DECAY
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION
FERMIONS
G MATRIX
GAMOW-TELLER RULES
GERMANIUM 76
GERMANIUM ISOTOPES
HADRONS
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATRICES
MATRIX ELEMENTS
NEODYMIUM 150
NEODYMIUM ISOTOPES
NUCLEAR DECAY
NUCLEAR DEFORMATION
NUCLEI
NUCLEONS
RANDOM PHASE APPROXIMATION
RARE EARTH NUCLEI
RESIDUAL INTERACTIONS
RESONANCE
STABLE ISOTOPES