Angular distributions of recoil products from some reactions induced in 65Cu and 197Au by protons of energy 30–85 MeV

15 November 1968

journal article
Published by Canadian Science Publishing in Canadian Journal of Chemistry

Vol. 46 (22) , 3551-3563
https://doi.org/10.1139/v68-588

Abstract

Angular distributions of products formed in the reactions ⁶⁵Cu(p,pn)⁶⁴Cu, ¹⁹⁷Au(p,pn)^I96Au, and ¹⁹⁷Au(p,p3n)¹⁹⁴Au in the range of proton energy 30–85 MeV were studied. The angular distribution results of ⁶⁴Cu and ¹⁹⁶Au show forward peaking at low energy and sidewise peaking at higher energies. Approximate symmetry about 90° was observed for the angular distribution of ¹⁹⁴Au in the center-of-mass system. The experimental results have been compared with (a) Monte Carlo evaporation calculations, (b) cascade–evaporation calculations at 85 MeV for ⁶⁴Cu, and (c) inelastic scattering plus evaporation calculations.Good agreement was obtained with statistical theory calculations at low energy and inelastic scattering model calculations at higher energies. The comparisons indicate that the reactions proceed by the compound nucleus mechanism at lower energies and the direct interaction mechanism predominates at higher energies.

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