Nuclear matrix element for two neutrino double beta decay from 136Xe

Abstract

The nuclear matrix element for the two neutrino double beta decay (DBD) of 136Xe was evaluated by FSQP (Fermi Surface Quasi Particle model), where experimental GT strengths measured by the charge exchange reaction and those by the beta decay rates were used. The 2 neutrino DBD matrix element is given by the sum of products of the single beta matrix elements via low-lying (Fermi Surface) quasi-particle states in the intermediate nucleus. 136Xe is the semi-magic nucleus with the closed neutron-shell, and the beta + transitions are almost blocked. Thus the 2 neutrino DBD is much suppressed. The evaluated 2 neutrino DBD matrix element is consistent with the observed value.

arXiv comment7 pages 6 figures

References in corpus (6)

• Double Beta Decay, Majorana Neutrinos, and Neutrino Mass
• The 0nbb-decay nuclear matrix elements with self-consistent short-range correlations
• Observation of Two-Neutrino Double-Beta Decay in Xe-136 with EXO-200
• Shell Model Analysis of the Neutrinoless Double Beta Decay of ${}^{48}$Ca
• The ${}^{150}$Nd(${}^3$He,$t$) and ${}^{150}$Sm($t$,${}^3$He) reactions with applications to $\beta \beta$ decay of ${}^{150}$Nd
• Average and recommended half-life values for two neutrino double beta decay: upgrade'05

Cited by in corpus (8)

• Theory of neutrinoless double beta decay
• Neutrinoless double beta decay and neutrino mass
• The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay
• $0\nu \beta \beta$ nuclear matrix elements, neutrino potentials and $\mathrm{SU}(4)$ symmetry
• Spin dipole nuclear matrix elements for double beta decay nuclei by charge-exchange reactions
• FSQP nuclear matrix elements for two neutrino double beta decays
• Axial-vector weak coupling at medium momentum for astro neutrinos and double beta decays
• Trapped-ion decay spectroscopy towards the determination of ground-state components of double-beta decay matrix elements