Dynamical dipole $\gamma$ radiation in heavy-ion collisions on the basis of the quantum molecular dynamics model

TL;DR

This paper investigates dynamical dipole gamma-ray emission in heavy-ion collisions using the quantum molecular dynamics model, revealing its sensitivity to nuclear symmetry energy and the equation of state.

Contribution

It introduces a detailed quantum molecular dynamics simulation approach to study dynamical dipole gamma-ray emission and its dependence on isospin and symmetry energy.

Findings

Gamma-ray yields and spectra are calculated for $^{40}$Ca + $^{48}$Ca collisions.

The centroid energy and emission width of gamma spectra are extracted.

Results show sensitivity of gamma emission to symmetry energy and nuclear equation of state.

Abstract

Dynamical dipole $\gamma$-ray emission in heavy-ion collisions is explored in the framework of the quantum molecular dynamics model. The studies are focused on systems of $^{40}$Ca bombarding $^{48}$Ca and its isotopes at different incident energies and impact parameters. Yields of $\gamma$ rays are calculated and the centroid energy and dynamical dipole emission width of the $\gamma$ spectra are extracted to investigate the properties of $\gamma$ emission. In addition, sensitivities of dynamical dipole $\gamma$-ray emission to the isospin and the symmetry energy coefficient of the equation of state are studied. The results show that detailed study of dynamical dipole $\gamma$ radiation can provide information on the equation of state and the symmetry energy around the normal nuclear density.