A study of stopping power in nuclear reactions at intermediate energies

TL;DR

This paper presents a comprehensive experimental investigation of stopping power in symmetric nuclear reactions at intermediate energies, highlighting the influence of entrance channel effects and isospin diffusion, and providing data to test microscopic transport models.

Contribution

It offers new systematic experimental data on nuclear stopping power across a range of system masses and energies, including isospin diffusion effects at specific energies.

Findings

Strong nuclear transparency observed above 20 AMeV/A

Memory of entrance channel effects persists at intermediate energies

Results serve as valuable tests for microscopic transport models

Abstract

We show a systematic experimental study based on INDRA data of the stopping power in central symmetric nuclear reactions. Total mass of the systems goes from 80 to 400 nucleons while the incident energy range is from 12 AMeV to 100 AMeV. The role of isospin diffusion at 32 and 45 MeV/nucleon with 124,136Xe projectiles on 112,124Sn targets performed at GANIL is also discussed. Results suggest a strong memory of the entrance channel above 20 AMeV/A (nuclear transparency) and, as such, constitute valuable tests of the microscopic transport models.