Two-neutrino double beta decay of 76Ge within deformed QRPA: A new suppression mechanism

Abstract

The effect of deformation on the two-neutrino double decay (2nbb-decay) for ground state transition 76Ge -> 76Se is studied in the framework of the deformed QRPA with separable Gamow-Teller residual interaction. A new suppression mechanism of the 2nbb-decay matrix element based on the difference in deformations of the initial and final nuclei is included. An advantage of this suppression mechanism in comparison with that associated with ground state correlations is that it allows a simultaneous description of the single beta and the 2nbb-decay. By performing a detail calculation of the 2nbb-decay of 76Ge, it is found that the states of intermediate nucleus lying in the region of the Gamow-Teller resonance contribute significantly to the matrix element of this process.

33 pages, 12 figures

References in corpus (18)

• Nuclear Ground-State Masses and Deformations
• Latest Results from the Heidelberg-Moscow Double Beta Decay Experiment
• Double Beta Decay
• Double Beta Decay
• Neutrinoless double beta decay from a modern perspective
• Neutrino mass spectrum and neutrinoless double beta decay
• Constraints from Neutrino Oscillation Experiments on the Effective Majorana Mass in Neutrinoless Double $\beta$-Decay
• Shapes and beta decay in proton rich Ge, Se, Kr and Sr isotopes
• The Pauli principle, QRPA and the two-neutrino double beta decay
• Beta decay and shape isomerism in 74Kr
• Spin-isospin excitations and beta+/EC half-lives of medium-mass deformed nuclei
• Beta-decay in odd-A and even-even proton-rich Kr isotopes
• Proton-neutron pairing in the deformed BCS approach
• Average (RECOMMENDED) Half-Life Values for Two Neutrino Double Beta Decay
• The Single State Dominance Hypothesis and the Two-Neutrino Double Beta Decay of Mo100
• Double beta decay of ${}^{100}Mo$: the deformed limit
• Double beta decay to excited states in Nd150
• Two-Neutrino Double Beta Decay: Critical Analysis

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