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VOLUME 83 (2006) | ISSUE 1 | PAGE 7
Observation of the neutron radiative decay
PACS: 13.30.Ce, 13.40.Hq, 14.20.Dh
Abstract
The aim of this work is experimental observation and research of a rare neutron mode, the radiative beta-decay, where a new particle, the radiative gamma-quantum, is formed along with the expected decay products beta-electron, recoil proton and antineutrino. The discovery of this rare neutron decay mode was conducted through identification of triple coincidences events: simultaneous registration of beta electron, proton and radiative gamma-quantum. The ordinary neutron decay was registered by double coincidences of beta electron and recoil proton. The statistics collected allow one to deduce the branching ratio (BR) {\rm BR} = (3.2\pm1.6)\cdot10^{-3} (90% C.L.) in the gamma energy region greater than 35 keV. This value of BR is consistent with standard electroweak theory.