Subbarrier fusion reactions with dissipative couplings

TL;DR

This paper uses a random matrix model to analyze how non-collective state couplings influence subbarrier fusion, revealing they hinder barrier penetration at energies above the barrier but have limited effect at deep subbarrier energies.

Contribution

It introduces a novel application of the random matrix model to study non-collective state effects on fusion barrier penetrability.

Findings

Non-collective excitations hinder penetrability above the barrier.

Barrier distribution is smeared at energies above the barrier.

Deep subbarrier penetrability remains largely unaffected.

Abstract

Using the random matrix model, we discuss the effect of couplings to non-collective states on the penetrability of a one dimensional potential barrier. We show that these non-collective excitations hinder the penetrability and thus smear the barrier distribution at energies above the barrier, while they do not affect significantly the penetrability at deep subbarrier energies. The energy dependence of the Q-value distribution obtained with this model is also discussed.