Abstract

Abstract Complete expressions, with all Coulomb effects taken into account, are given for the distribution functions for allowed beta decay, including recoil, nuclear orientation, and electron polarization effects. The expressions are general in that no assumptions are made as to invariance with respect to space inversion, charge conjugation, or time reversal. Simple arguments based on the behaviour of the various momenta and angular momenta under space inversion and time reversal are used to elucidate which combinations of vectors will appear when the different symmetry laws are violated, and the modifications of these arguments necessary because of the Coulomb interaction in the final state are pointed out. Various tests of time reversal invariance, previously suggested, are re-evaluated in view of the results for the Coulomb corrections.

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