Measurement and analysis of alpha-induced reactions on Ta, Ag and Co

Abstract

Excitation functions for the reaction ¹⁸¹Ta (α, xn)^185-x Re,^107,109Ag (α, ypxn) and ⁵⁹Co (α, ypxn) were obtained from measurements of residual activity of stacked foils from threshold to 60 MeV. The excitation functions for the production of ¹⁸¹Re,¹⁸²Re,¹⁸³Re,¹⁸⁴Re,¹⁰⁵Ag, ¹¹¹In,⁵⁴Mn,⁵⁶Co,⁵⁸Co, and ⁶⁰Co, are being presented. The experimental data are compared with calculations considering equilibrium as well as pre-equilibrium reactions according to the hybrid model of Blann. High energy part of the excitation functions is dominated by the pre-equilibrium reaction mechanism. Calculations were done using a priori calculational method of Overlaid Alice Code of Blann. Most of the excitation functions in the energy range mentioned above could be very well fitted with the hybrid model calculation for exciton number n=4 withn p=2 and n n=2. The overall agreement with theory is good. Certain discrepancies, however, indicate the necessity to revise the hybrid model with respect to emission of complex particles.