Fusion cross sections for 6,7Li + 24Mg reactions at energies below and above the barrier

TL;DR

This study measures fusion cross sections for 6,7Li + 24Mg reactions across a range of energies, showing consistency with total reaction cross sections and no significant fusion enhancement or inhibition at different energies.

Contribution

It provides new experimental fusion cross section data for 6,7Li + 24Mg reactions at various energies, using gamma-ray detection methods.

Findings

Fusion cross sections agree with total reaction cross sections at low energies.

Fusion cross sections decrease with increasing energy due to opening of breakup channels.

Critical angular momenta show energy dependence similar to other lithium-induced reactions.

Abstract

Measurement of fusion cross sections for the 6,7Li + 24Mg reactions by the characteristic gamma-ray method has been done at energies from below to well above the respective Coulomb barriers. The fusion cross sections obtained from these gamma-ray cross sections for the two systems are found to agree well with the total reaction cross sections at low energies. The decrease of fusion cross sections with increase of energy is consistent with the fact that other channels, in particular breakup open up with increase of bombarding energy. This shows that there is neither inhibition nor enhancement of fusion cross sections for these systems at above or below the barrier. The critical angular momenta (lcr) deduced from the fusion cross sections are found to have an energy dependence similar to other Li - induced reactions.