Speaker
Description
Short range correlation (SRC) in nuclei refers to the nucleons forming temporally correlated pairs in close proximity, giving rise to the high momentum of the nucleons beyond Fermi surface. It has been reported that Bremsstrahlung gamma production from np process in heavy ion reactions provides a novel probe to the existence of SRC in nuclei. In this talk, I will present the first quantitative results of measuring the Bremsstrahlung gamma rays in $^{124}$Sn+$^{124}$Sn reactions at 25 MeV/u using the Compact Spectrometer for Heavy IoN Experiment (CSHINE). Two main methods are applied to subtract the background. By comparing the experimental gamma spectrum with the Isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) simulations, the ratio of the high momentum tail (HMT) arising from the SRC is extracted as $(20\pm7)\%$ is obtained at a $3\sigma$ confidence level.
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