Comparative Study of Pre-Equilibrium Models and Mechanism of Alpha Particle Induced Reactions

Abstract

Excitation functions of (α, xn yp zα) reactions on 93Nb and 169Tm have been measured upto 50 MeV by stacked-foil activation technique with a view to improve the quality of data in the case of 169Tm, which was earlier measured with a poor resolution scintillation detector. Comparisons are presented with the predictions of three pre-equilibrium models (i.e. Exciton, Hybrid and Index Models). While for {α, xn) type of reactions reasonably explainable pre-compound contributions are found, there seem to be indications of direct inelastic scattering effects in (α, αxn) type of reactions in medium and heavy nuclei. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.