a -clustering effect on flows of direct photons in heavy-ion collisions

In this study, we reconstruct the c -photon energy spectrum, which is in good agreement with the experimental data of 86 Kr ? 12 C at E / A = 44 MeV within the framework of the modified EQMD model. The directed and elliptic flows of free protons and direct photons were investigated by considering the a -clustering structure of 12 C. Compared with free protons, direct photon flows provide clearer information about the early stage of a nuclear reaction. The difference in the collective flows between different configurations of 12 C is observed in this study. This indicates that the collective flows of direct photons are sensitive to the initial configuration. Therefore, the c bremsstrahlung process might be taken as an alternative probe to investigate the a -clustering structure in a light nucleus from heavy-ion collisions within the Fermi-energy region.

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