First observation of P-odd asymmetry of α-particle emission in the 10B(n, α)7 Li nuclear reaction

We present measurements of P-odd asymmetry of emission of a-particles in the 10B(n, alpha)(7) Li nuclear reaction, which are carried out using beams of polarized cold neutrons at Petersburg Nuclear Physics Institute (PNPI, Gatchina, Russia) and Institut Max von Laue-Paul Langevin (ILL, Grenoble, France) nuclear reactors. The alpha-particle detector is an ionization chamber with insensitive gaseous layer. We measured the P-odd asymmetry coefficient to be equal to alpha(p-odd) (10 beta,alpha) = -(11.2 +/- 3.4).10(-8). (C) 2017 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license.