⁵⁹Co($\vec p$,α) reaction at 100 MeV incident energy – statistical multistep direct reaction into the continuum of outgoing energies

Abstract

Abstract. The pre-equilibrium proton induced emission of light complex nuclei with energies in the continuum has been studied comprehensively for many years. Double-differential cross sections and especially analyzing power distributions are typical of an intranuclear nucleon-nucleon multistep statistical reaction mechanism. The final stage of the reaction may be a result of a direct pickup or knockout of the ejectile. The discussion on this subject continues to be a hot topic for both theoretical and experimental investigations. In this paper the results from the latest studies of the inclusive ( p,α) reactions on 59 Co to the continuum will be reported. The formalism based on the statistical multistep direct emission formulation of Feshbach, Kerman and Koonin is found to give a reasonably good reproduction of cross section and analyzing power distributions at various emission energies. Special attention will be paid to the details of the calculations.

Proton-induced pre-equilibrium composite-particle emission

“…Insight into the reaction mechanism of proton-induced pre-equilibrium α-particle emission has progressed considerably during the last 7 years as a result of investigations conducted by an international collaboration from Stellenbosch, Sofia and Dubna [1][2][3][4][5][6]. The purpose of this review is to highlight how these new perspectives which emerged from our studies contrast with long-held misconceptions of how the reaction mechanism behaves, and why the earlier incorrect viewpoints took a foothold in the past.…”