Light charged particle emission from hot $^{32}$S$^{*}$ formed in $^{20}$Ne + $^{12}$C reaction

TL;DR

This study measures light charged particle emissions from hot $^{32}$S nuclei formed in $^{20}$Ne + $^{12}$C reactions, analyzing energy spectra and decay sequences to understand nuclear deformation effects and decay mechanisms.

Contribution

It provides new insights into the decay sequence of hot $^{32}$S nuclei using exclusive light charged particle measurements and compares experimental data with statistical model predictions.

Findings

Deformation effects are necessary to explain $d, t$ spectra shapes.

Proton spectra are insensitive to deformation, but angular distributions are affected.

Exclusive data can probe decay sequences of hot light nuclei.

Abstract

Inclusive energy distributions for light charged particles ($p, d, t$ and $\alpha$) have been measured in the $^{20}$Ne (158, 170, 180, 200 MeV) + $^{12}$C reactions in the angular range 10$^{o}$ -- 50$^{o}$. Exclusive light charged particle energy distribution measurements were also done for the same system at 158 MeV bombarding energy by in-plane light charged particle -- fragment coincidence. Pre-equilibrium components have been separated out from proton energy spectra using moving source model considering two sources. The data have been compared with the predictions of the statistical model code CASCADE. It has been observed that significant deformation effects were needed to be introduced in the compound nucleus in order to explain the shape of the evaporated $d, t$ energy spectra. For protons, evaporated energy spectra were rather insensitive to nuclear deformation, though angular distributions could not be explained without deformation. Decay sequence of the hot $^{32}$S nucleus has been investigated through exclusive light charged particle measurements using the $^{20}$Ne (158 MeV) + $^{12}$C reaction. Information on the sequential decay chain has been extracted through comparison of the experimental data with the predictions of the statistical model. It is observed from the present analysis that exclusive light charged particle data may be used as a powerful tool to probe the decay sequence of hot light compound systems.