Elastic Scattering of 24-Mev Neutrons by Al, Fe, Sn, Bi

Abstract

Angular distributions have been measured for angles between 15° and 90° in 5° steps. Cylindrical scatterers were ½ or $\frac{3}{4}$ mean-free path in diameter as calculated on the basis of total cross sections. These cylinders were bombarded with neutrons from the $\mathrm{T}(d, n){\mathrm{He}}^4$ reaction, and the scattered neutrons were detected in a plastic scintillator. Biases were set at energies between 14 and 24 Mev. Corrections for effects due to scatterer size were calculated with a Monte Carlo code on the Univac and IBM 704. The corrected cross sections are in good agreement with optical model calculations by Bjorklund and Fernbach.