Affordable Access

Publisher Website

Angular distribution effect on the integrated cross section for radiative capture of 14 MeV neutrons

Authors
Journal
Nuclear Physics A
0375-9474
Publisher
Elsevier
Publication Date
Volume
645
Issue
2
Identifiers
DOI: 10.1016/s0375-9474(98)00609-5
Keywords
  • Nuclear Structure And Dynamics

Abstract

Abstract In the past, many reported integrated cross sections for the 14 MeV neutron radiative capture were measured at 90° relative to the neutron beam direction and multiplied by 4π, so as to obtain a measure of the angle-integrated cross sections. In such a procedure, an isotropic angular distribution of γ-rays is assumed. We calculated this distribution using the consistent direct-semi-direct model, in which the need for the model-free parameters has been eliminated. The result is that the a 1 Legendre polynomial, averaged over the bound state transitions, is practically zero (distribution is forward-backward symmetric) and that the a 2 coefficient is a smooth function of the mass number with the values between −0.4 and −0.6, indicating anisotropy of the distribution. Reported integrated cross sections are therefore for about 20% to 30% too high relative to the properly angle integrated cross sections.

There are no comments yet on this publication. Be the first to share your thoughts.