Description of the 2νββ decay within a fully renormalised RPA approach

The RPA treatment of a many body Hamiltonian describing the states of even-even nuclei involved in a 2νββ decay is revisited. One shows that renormalizing the dipole two quasiparticle operators by accounting for new correlations in the ground state requires a simillar renormalization for the dipole...

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Bibliographic Details
Published in:Nuclear physics. A 1998-05, Vol.634 (4), p.497-524
Main Authors: Raduta, A.A., Raduta, C.M., Faessler, Amand, Kamiński, W.A.
Format: Article
Language:English
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Summary:The RPA treatment of a many body Hamiltonian describing the states of even-even nuclei involved in a 2νββ decay is revisited. One shows that renormalizing the dipole two quasiparticle operators by accounting for new correlations in the ground state requires a simillar renormalization for the dipole density operators which results in activating new boson degress of freedom. Possible consequences on Ikeda sum rule and Gamow-Teller transition amplitude are suggested. A numerical application for a two levels model is presented
ISSN:0375-9474
DOI:10.1016/S0375-9474(98)00179-1