Time Reversal Invariance in the beta-Decays of A = 8 Nuclei

Details Time Reversal Invariance in the beta-Decays of A = 8 Nuclei Time Reversal Invariance in the beta-Decays of A = 8 Nuclei

1994-11-01

arxiv.org/abs/nucl-th/9411001v1

Physics

Nuclear Physics

Nuclear Theory

64 pages, latex, 26 figures (available upon request)

Scientific paper

10.1016/0375-9474(94)00720-8

We examine time reversal invariance in the beta-decays of 8B(2+) and 8Li(2+) to 8Be(2+) in detail, with particular attention to final state interactions of the two alpha particles from the decay of 8Be, and of the electron (positron) with the daughter nucleus. A R-matrix formulation is used, with the initial state described by a shell model. The R-matrix parameters are obtained by fitting the alpha-\alpha scattering phase shifts and allowed beta-decay rates. Because the nuclear final state interaction effects on the time reversal test come from second forbidden beta-decays, they are small and can be minimized by a suitable choice of kinematic conditions. The e(+/-)-nucleus Coulomb interaction induced T-violation effects depend on the first forbidden operators.

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