Chinese Physics C > 2025, Vol. 49 > Issue(8): 084103 DOI: 10.1088/1674-1137/add872

Effects of nucleon-nucleon short-range correlation on fragment generation in isotopic nuclear reactions

1.
College of Physics, Centre for Theoretical Physics, Henan Normal University, Xinxiang 453007, China
2.
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, China
3.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
4.
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
5.
Institute of Nuclear Science and Technology, Henan Academy of Sciences, Zhengzhou 450046, China

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Abstract：
The effects of nucleon-nucleon short-range correlations leading to the high-momentum tail (HMT) in the nucleon momentum distribution are studied using the isospin- and momentum-dependent Lanzhou quantum molecular dynamics (LQMD) transport model. Based on the transport model, we study the effects of the HMT of the nucleon momentum distribution on initialization in isotopic nuclear reactions at a beam energy of 120 MeV/u. The single and double ratios of gas-phase neutron and proton spectra are analyzed and compared with experimental data in central $ ^{112} {\rm{Sn}}$ + $ ^{112} {\rm{Sn}}$ and $ ^{124} {\rm{Sn}}$ + $ ^{124} {\rm{Sn}}$ collisions. The HMT affects the single ratios but not the double ratios, which can be employed to study other isospin effects more effectively. The ratio of triton to $ ^3 {\rm{He}}$ of light clusters contained in the gas-phase nucleons is also influenced by the HMT. Combining the QMD transport model that can describe multi-fragmentation and the production of fragments in intermediate-energy heavy-ion collisions, we study the short-range correlation effect on fragment generation. We find that the isospin-dependent HMT significantly affects the fragment multiplicity distribution and average neutron-to-proton ratio of produced isobars.
- nucleon-nucleon short-range correlation,
- high-momentum tail,
- nuclear fragmentation reaction,
- LQMD transport model

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Ya-Fei Guo, Yong-Qing Feng, Zhao-Qing Feng, Gao-Chan Yong and Chun-Wang Ma. Effects of nucleon-nucleon short-range correlation on fragment generation in isotopic nuclear reactions[J]. Chinese Physics C. doi: 10.1088/1674-1137/add872

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Effects of nucleon-nucleon short-range correlation on fragment generation in isotopic nuclear reactions

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