Elsevier

Nuclear Physics A

Volume 197, Issue 1, 11 December 1972, Pages 241-258
Nuclear Physics A

Parity non-conservation in radiative thermal neutron capture by protons

https://doi.org/10.1016/0375-9474(72)90759-2Get rights and content

Abstract

The circular polarization of γ-quanta from the reaction n+p → d+γ has been measured using a light-water neutron trap in the reactor active zone as a γ-ray source. The trap was shielded from the γ-radiation of the active zone by lead and bismuth screens. The effective source activity was 1016γ-quanta/sec. For the γ-ray circular polarization measurements use was made of a transmission-type polarimeter and of integral current detection with the separation and accumulation of a periodic signal. Zero control experiments were carried out using γ-quanta from the 24Mg and 48Ti(n,γ)49Ti reaction as non-polarized γ-ray sources. The circular polarization of γ-rays from the reaction n+p → d+γ was found to be P = −(1.30 ± 0.45) × 10−6.

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