Parity-violating asymmetry in the reactions 6Li $(n,\alpha)$ 3H and 10B $(n,\alpha)^{7}$ Li* $\rightarrow$ 7Li $+$ $\gamma$

Abstract

We present two experiments measuring the parity-violating asymmetry (P-odd) of tritons emission in the reaction 6 Li(n, α) 3 H and γ -quanta emission in the reaction 10 B(n, α) 7 Li* → 7 Li + γ with polarized cold neutrons, aiming at estimation of the weak meson-nucleon coupling constants. These experiments started in the PNPI, Gatchina and continued in the ILL, Grenoble. We describe an integral method to measure P-odd asymmetry and the two experiments. The results of our measurements are: α 6Li P−odd = (−8.8 ± 2.1) · 10 −8 and α 10B P−odd = (0.8 ± 3.9) · 10 −8 .