$\alpha$-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

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