Comparison of different proximity potentials for asymmetric colliding nuclei

TL;DR

This study compares 12 phenomenological proximity potentials to evaluate their effectiveness in predicting fusion barriers for asymmetric nuclei collisions, highlighting the influence of asymmetry on model parameters and their ability to match experimental data.

Contribution

It provides a comprehensive comparison of various proximity potentials for asymmetric nuclear collisions, emphasizing the impact of asymmetry on model parameters and fusion barrier predictions.

Findings

All models explain fusion barrier heights within ±10%.

Bass 80, AW 95, and Denisov DP potentials effectively predict fusion cross sections.

Surface energy coefficient and nuclear radius depend significantly on asymmetry.

Abstract

Using the different versions of phenomenological proximity potential as well as other parametrizations within the proximity concept, we perform a detailed comparative study of fusion barriers for asymmetric colliding nuclei with asymmetry parameter as high as 0.23. In all, 12 different proximity potentials are robust against the experimental data of 60 reactions. Our detailed study reveals that the surface energy coefficient as well as radius of the colliding nuclei depend significantly on the asymmetry parameter. All models are able to explain the fusion barrier heights within $\pm10%$ on the average. The potentials due to Bass 80, AW 95, and Denisov DP explain nicely the fusion cross sections at above- as well as below-barrier energies.