$\alpha$-clustering effect on flows of direct photons in heavy-ion collisions

Abstract

In this work, we reconstruct the $\gamma$-photon energy spectrum which is in good agreement with the experimental data of ${}^{86}$Kr + ${}^{12}$C at $E/A$ = 44 MeV in the framework of our modified EQMD model. The directed flow and elliptic flow of free protons and direct photons have been investigated by taking $\alpha$-clustering structure of ${}^{12}$C into account. Comparing with the free proton, the direct photon flows give a clearer information about early stage of nuclear reaction. Difference of collective flows between different configurations of ${}^{12}$C is observed in this work. This indicates that collective flows of direct photons are sensitive to the initial configuration, therefore the $\gamma$ bremsstrahlung process might be taken as an alternative probe to investigate $\alpha$-clustering structure in light nucleus from heavy ion collisions at Fermi-energy region.

10 pages, 9 figures

References in corpus (8)

• Giant Dipole Resonance as a Fingerprint of $\alpha$ Clustering Configurations in ${}^{12}$C and ${}^{16}$O
• Hard photon flow and photon-photon correlation in intermediate energy heavy-ion collisions
• Clustering structure effect on Hanbury-Brown-Twiss correlation in ${}^{12}$C + ${}^{197}$Au collisions at 200 GeV}
• Two-proton momentum correlation from photondisintegration of $\alpha$-clustering light nuclei in the quasi-deuteron region
• Azimuthal asymmetry of direct photons in intermediate energy heavy-ion collisions
• Correlation between elliptic flow and shear viscosity in intermediate-energy heavy-ion collisions
• Network structure of thermonuclear reactions in nuclear landscape
• Direct photon emission and influence of dynamical wave packets in an extended quantum molecular dynamics model

Cited by in corpus (9)

• Machine-learning-based identification for initial clustering structure in relativistic heavy-ion collisions
• Accessing the in-medium effects on nucleon-nucleon elastic cross section with collective flows and nuclear stopping
• Effects of sequential decay on collective flows and nuclear stopping power in heavy-ion collisions at intermediate energies
• Short range correlations in the extended quantum molecular dynamics model
• System evolution of forward-backward multiplicity correlations in a multi-phase transport model
• Effect of initial-state geometric configurations on the nuclear liquid-gas phase transition
• Effects of neutron-skin thickness on direct hard photon emission from reactions induced by the neutron-rich projectile ${}^{50}$Ca
• Momentum correlation of light nuclei in Au + Au collisions at $\sqrt{s_{NN}}$ = 2.0 $\sim$ 7.7 GeV
• Signatures of an $\alpha$ + core structure in ${}^{44}$Ti + ${}^{44}$Ti collisions at $\sqrt{s_{NN}}=5.02$ TeV by a multiphase transport model