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Statistical-Model Calculation of the Angular Distributions of () Reaction Products
Phys. Rev. C 1, 4 – Published 1 January, 1970
DOI: https://doi.org/10.1103/PhysRevC.1.4
Abstract
A calculation of the angular distribution of recoil products resulting from compound nuclear () reactions has been programmed on the basis of the spin-dependent statistical theory of nuclear reactions. The program, which is based on the Monte Carlo technique, considers the emission of neutrons, protons, particles, and rays, and uses either the Fermi-gas or the superconductor model of the nucleus. The computed angular distributions have been compared with the experimental results for various () reactions and, in agreement with experiment, exhibit a smooth dropoff from a peak close to 0°. This contrasts with the marked disagreement between the experimental results and previous spin-independent calculations, which predicted a peak at large angles to the beam. The difference is ascribed to the effect of competitive -ray emission, which is not adequately considered in spin-independent calculations. The present calculation predicts a faster decrease with angle in the magnitude of the differential cross section than is observed experimentally. This result is independent of the specific parameterization of the calculation and may reflect a small contribution from direct interactions.
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