Preequilibrium emission of protons and α-particles in reactions on 59Co nucleus at proton energy of 30 MeV

Abstract

Double differential cross sections of the reactions (p, xp) and (p, xα) on target nucleus 59Co with a proton accelerated by the isochronous cyclotron U-150M (Institute of Nuclear Physics of Republic of Kazakhstan) to the energy of Ep = 30 MeV were measured. These measurements were performed in the angular range from 30º to 135º with the steps of 15º. The selected object of study 59Co, is a candidate for a structural material in nuclear plants. The experimental integral and partial cross-sections of the investigated reactions were defined from the double differential cross sections. The value of the experimental cross section of the partial reactions (p, xp) on 59Co nucleus was equal to 1002.0 ± 1.5 mb, (p, xa) – 57.0 ± 0.5 Mb.

The analysis of experimental results carried out within exciton model of nuclei decay using code PRECO-2006 that described the transition of the excited system to equilibrium. The contributions in the formation of the integral cross sections of compound, pre-equilibrium and direct mechanisms were estimated.

The obtained results are of interest to both fundamental nuclear physics and different application areas, in particular, nuclear transmutation of long-lived radioactive wastes.