Experimental and theoretical excitation functions for 85Rb(α,xn) in the energy range upto 60MeV

Anika Johari, A. K. Saxena

Abstract

Excitation functions for the 85Rb (α, xn) reactions are measured up to the energy range 60 MeV using the stacked foil technique. In the cases of the 85Rb (α, xn) reaction pairs, the excitation functions for individual reactions were deduced using theoretical calculations. Excitation functions are also calculated theoretically using the compoundnucleus model with and without the inclusion of a pre-equilibrium emission. As expected, inclusion of a preequilibrium contribution based on the exciton model along with compound-nucleus calculations using the Hauser- Feshbach formalism reproduces well the measured excitation functions. Analysis of the data indicates a preference for a first chance neutron emission over charge d particle emission, and interesting trends in the energy and massnumber dependence of the pre-equilibrium fraction are observed.