Triple correlation in the B-10(n, alpha gamma)Li-7 reaction

The formally T-odd triple correlation between the directions of the momenta of alpha particle and gamma quantum and the polarization pseudovector of a thermal neutron was examined for the B-10 + n = Li-7 + He-4 + gamma reacti on. Such T-odd correlations can be directly used for checking time reversal invariance in the elastic scattering of particles. In more complex reactio ns, this correlation can occur as a result of particle interactions in the entrance and exit channels of the reaction and, being a background effect, requires correct theoretical or direct experimental estimation. Our experim ents gave an upper limit of 3.2 x 10(-4) (90% confidence level) for the pos sible T-odd asymmetry parameter in the reaction under study. (C) 2000 MAIK "Nauka / Interperiodica".