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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2501.09576 |
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| _version_ | 1866913880010129408 |
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| author | Si, Dawei Xiao, Sheng Qin, Zhi Qin, Yuhao Xu, Junhuai Tian, Baiting Zhang, Boyuan Zhang, Haojie Guo, Dong Wang, Yijie Wei, Xiaobao Hao, Yibo Wang, Zengxiang Zhuo, Tianren Ma, Chunwang Yang, Yuansheng Wei, Xianglun Yang, Herun Ma, Peng Duan, Limin Duan, Fangfang Wang, Kang Ma, Junbing Xu, Shiwei Bai, Zhen Yang, Guo Yang, Yanyun Xiao, Zhigang |
| author_facet | Si, Dawei Xiao, Sheng Qin, Zhi Qin, Yuhao Xu, Junhuai Tian, Baiting Zhang, Boyuan Zhang, Haojie Guo, Dong Wang, Yijie Wei, Xiaobao Hao, Yibo Wang, Zengxiang Zhuo, Tianren Ma, Chunwang Yang, Yuansheng Wei, Xianglun Yang, Herun Ma, Peng Duan, Limin Duan, Fangfang Wang, Kang Ma, Junbing Xu, Shiwei Bai, Zhen Yang, Guo Yang, Yanyun Xiao, Zhigang |
| contents | The neutron-neutron ($nn$) correlation function has been measured in 25 MeV/u $^{124}$Sn+$^{124}$Sn reactions.
Using the Lednický-Lyuboshitz approach, the $nn$ scattering length and effective range ($f_{0}^{nn}$, $d_{0}^{nn}$), as well as the reduced space-time size $R^{(0)}$ of the neutron emission source are simultaneously extracted as ($18.9^{+1.3}_{-1.2}$ fm, $1.9^{+1.3}_{-1.0}$ fm) and $4.12 \pm 0.12$ fm, respectively. The measured $nn$ scattering length is consistent with the results obtained in the low-energy scattering $^{2}{\rm H}(π^{-},γ)2n$, indicating heavy-ion collisions can serve as an effective approach for measuring $nn$ interactions and further investigating the charge symmetry breaking of nuclear force. The space-time size extracted from momentum-gated correlation functions exhibits clear dependence on the pair momentum, with $R^{(0)}=2.8 \pm 0.1 $ fm and $4.9 \pm 0.2$ fm being determined for the high and low momentum neutrons, respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_09576 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Extract neutron-neutron interaction strength and spatial-temporal dynamics of neutron emission from two-particle correlation function Si, Dawei Xiao, Sheng Qin, Zhi Qin, Yuhao Xu, Junhuai Tian, Baiting Zhang, Boyuan Zhang, Haojie Guo, Dong Wang, Yijie Wei, Xiaobao Hao, Yibo Wang, Zengxiang Zhuo, Tianren Ma, Chunwang Yang, Yuansheng Wei, Xianglun Yang, Herun Ma, Peng Duan, Limin Duan, Fangfang Wang, Kang Ma, Junbing Xu, Shiwei Bai, Zhen Yang, Guo Yang, Yanyun Xiao, Zhigang Nuclear Experiment The neutron-neutron ($nn$) correlation function has been measured in 25 MeV/u $^{124}$Sn+$^{124}$Sn reactions. Using the Lednický-Lyuboshitz approach, the $nn$ scattering length and effective range ($f_{0}^{nn}$, $d_{0}^{nn}$), as well as the reduced space-time size $R^{(0)}$ of the neutron emission source are simultaneously extracted as ($18.9^{+1.3}_{-1.2}$ fm, $1.9^{+1.3}_{-1.0}$ fm) and $4.12 \pm 0.12$ fm, respectively. The measured $nn$ scattering length is consistent with the results obtained in the low-energy scattering $^{2}{\rm H}(π^{-},γ)2n$, indicating heavy-ion collisions can serve as an effective approach for measuring $nn$ interactions and further investigating the charge symmetry breaking of nuclear force. The space-time size extracted from momentum-gated correlation functions exhibits clear dependence on the pair momentum, with $R^{(0)}=2.8 \pm 0.1 $ fm and $4.9 \pm 0.2$ fm being determined for the high and low momentum neutrons, respectively. |
| title | Extract neutron-neutron interaction strength and spatial-temporal dynamics of neutron emission from two-particle correlation function |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2501.09576 |