Analysis of n-evaporation from light mass nuclei formed via p-induced reactions
Abstract
This work deals with the decay analysis of three compound nuclei 77As∗, 83Br∗ and 86Sr∗ formed in proton-induced reactions p+76Ge, p+82Se and p+85Rb at incident beam energies of 1–5 MeV using the Dynamical Cluster-decay Model (DCM). The motive is to explore the decay of compound systems formed via light charged particles as projectiles. The experimentally available data of n-evaporation for the aforementioned systems are addressed by optimizing the neck-length parameter ΔR, using spherical fragmentation approach. The comparative analysis of the decay structure of the chosen systems is carried out at a common incident beam energy Ebeam∼3.6 MeV. The effect of angular momentum (ℓ) and quadrupole (β2)-deformations is explored in reference to the decay structure/fragmentation of compound systems. In addition to this, the sensitivity of DCM-based cross-sections toward level density parameter (LDP) a is also analyzed. The relative role of mass-dependent level density parameter a(A) is also investigated for compound systems belonging to light and heavy mass region. Lastly, a theoretical systematics is explored where the proton beam in the reaction p+76Ge is replaced by a neutron beam forming the compound system 77Ge∗, having the same A, but Z one less than that of the compound system formed in the reaction using proton beam, and its effect on the decay characteristics such as preformation probability, penetration probability and barrier height is analyzed.
