Abstract
The angular distribution of individual rays, emitted from a neutron-induced compound-nuclear state via radiative capture reaction of has been studied as a function of incident neutron energy in the epithermal region by using germanium detectors. An asymmetry was defined as , where and are integrals of low- and high-energy region of a neutron resonance respectively, and we found that has the angular dependence of , where is the emitted angle of rays, with and in 0.74 eV -wave resonance. This angular distribution was analyzed within the framework of interference between - and -wave amplitudes in the entrance channel to the compound-nuclear state, and it is interpreted as the value of the partial -wave neutron width corresponding to the total angular momentum of the incident neutron combined with the weak matrix element, in the context of the mechanism of enhanced parity-violating effects. Additionally, we use the result to quantify the possible enhancement of the breaking of time-reversal invariance in the vicinity of the -wave resonance.
18 More- Received 9 October 2017
DOI:https://doi.org/10.1103/PhysRevC.97.034622
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