Mass dispersion in transfer reactions with a stochastic mean-field theory

TL;DR

This paper introduces a stochastic mean-field theory for nucleon transfer in heavy-ion reactions, successfully predicting mass distribution dispersions consistent with experimental data, addressing limitations of mean-field models.

Contribution

The paper develops a fully microscopic stochastic mean-field approach that accurately predicts mass dispersion in transfer reactions, improving upon traditional mean-field models.

Findings

Stochastic mean-field theory enhances mass dispersion predictions.

Dispersion scales with the number of exchanged nucleons.

Results align with experimental observations.

Abstract

Nucleon transfer in symmetric heavy-ion reactions at energies below the Coulomb barrier is investigated in the framework of a microscopic stochastic mean-field theory. While mean-field alone is known to significantly underpredict the dispersion of the fragment mass distribution, a considerable enhancement of the dispersion is obtained in the stochastic mean-field theory. The variance of the fragment mass distribution deduced from the stochastic theory scales with the number of exchanged nucleon. Therefore, the new approach provides the first fully microscopic theory consistent with the phenomenological analysis of the experimental data.