Short range correlations in the extended quantum molecular dynamics model

TL;DR

This paper enhances the quantum molecular dynamics model by incorporating short-range potentials, enabling better simulation of nuclear reactions and correlations, with validation against experimental data and analysis of proton emission characteristics.

Contribution

The study introduces a short-range potential into the EQMD model and demonstrates its effectiveness in simulating nuclear reactions and correlations.

Findings

The modified EQMD model accurately reproduces separation energies.

Short-range repulsion influences proton momentum spectra.

The model explains high momentum tails and weakened correlations.

Abstract

Short-range potential has been added into an extended quantum molecular dynamics (EQMD) model. The RMS radius, binding energy and momentum distribution of $^{12}$C with different initial structures and short-range potential parameters have been checked. The separation energy of $^{12}$C(p,2p)$^{11}$B reaction is calculated and compared with the experimental data, it indicates that our modified EQMD model can be taken as a reliable tool for studying proton pair knock-out reaction. Furthermore, the short range correlation effects on emission time and momentum spectrum of two protons are discussed. Finally, the momentum correlation function of the emitted proton pair is calculated by the Lednicky and Lyuboshitz's analytical method. The result explains that short-range repulsion causes high momentum tail and weakens the momentum correlation function.