Preequilibrium strength in light heavy-ion induced reactions up to 7 MeV/nucleon

Abstract

The crux of this article is to analyze the contribution of the preequilibrium reaction process to the production of residues in the low energy heavy-ion reactions. The production cross-sections of a few radionuclides produced through the 3n-emission channel have been measured from the 7Li-, 11B- and 12C-induced reactions in the 89Y and 93Nb targets within the energy range of ∼2.4–6.4 MeV/nucleon. The measured excitation functions have been analyzed by comparing them with the statistical nuclear reaction models, based on the equilibrium and preequilibrium reaction mechanisms, in the framework of ALICE91 and EMPIRE3.2.2. The result shows that the mixing of equilibrium and preequilibrium emission of light or cluster particles is essential for the better reproduction of the measured cross-section data. Variation of the preequilibrium fractions with derived energy parameters has also been demonstrated.

Probing reaction mechanisms through residual cross section measurement for 7Li+Zn system

“…In recent years, our group has emerged as a contributor to the investigations of low-energy CF-ICF mechanisms with weakly bound particles in medium-heavy mass regions [14-16, 21, 24]. Other mechanisms like equilibrium (EQ) and PEQ have also been studied [25,26] along with the laboratory scale production of some medically relevant radioisotopes such as 93m Mo [27], 97 Ru, 101m Rh [28], 149 Tb [29], etc. The insufficient nuclear reaction data in the mass region ∼60-70, ambiguous understanding of the reaction mechanisms, and theoretical refinements instigate us to explore the present system through excitation function (EF) analysis that is scarce in this mass region.…”