Angular Distribution of Photo-neutrons Produced by 17 Mev X-rays

Abstract

The angular distributions of photo-neutrons from lead, copper, aluminum and beryllium have been measured by using bremsstrahlung of maximum energy of 17 Mev from a betatron. The neutron detector is ZnS-paraffin-Lucite light guide button. The results are 1+(1.29±0.53)sin²θ, 1+(1.6±0.8)sin²θ, 1+(0.17±0.06)sin²θ, 1+(0.30±0.11)sin²θ for beryllium, aluminum, copper, and lead.