Abstract
Half-lives of the 2νββ decay are calculated in the proton-neutron QRPA for76Ge,82Se,100Mo,128,130Te,136Xe and150Nd. The strength of the particle-particle interaction, which plays a decisive role for a reliable evaluation of the half-lives, is determined from a QRPA calculation of singleβ + decays. The 2ν decay rates calculated with the interaction strength fitted in this way are strongly suppressed and found to be consistent with the existing experimental data. Effects of the ground-state correlations on the suppression are investigated. On the other hand, the present calculation indicates limitations of the QRPA approach.
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Muto, K., Bender, E. & Klapdor, H.V. Effects of ground-state correlations on 2νββ decay rates and limitations of the QRPA approach. Z. Physik A - Atomic Nuclei 334, 177–186 (1989). https://doi.org/10.1007/BF01294218
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DOI: https://doi.org/10.1007/BF01294218