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

Chen-Zhong Shi  Yu-Gang Ma  
【摘要】:In this study, we reconstruct the γ-photon energy spectrum, which is in good agreement with the experimental data of ~(86)Kr+~(12)C at E/A=44 Me V within the framework of the modified EQMD model. The directed and elliptic flows of free protons and direct photons were investigated by considering the α-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 γ bremsstrahlung process might be taken as an alternative probe to investigate the α-clustering structure in a light nucleus from heavy-ion collisions within the Fermienergy region.

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