{"paper":{"title":"Extract neutron-neutron interaction strength and spatial-temporal dynamics of neutron emission from two-particle correlation function","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"Baiting Tian, Boyuan Zhang, Chunwang Ma, Dawei Si, Dong Guo, Fangfang Duan, Guo Yang, Haojie Zhang, Herun Yang, Junbing Ma, Junhuai Xu, Kang Wang, Limin Duan, Peng Ma, Sheng Xiao, Shiwei Xu, Tianren Zhuo, Xianglun Wei, Xiaobao Wei, Yanyun Yang, Yibo Hao, Yijie Wang, Yuansheng Yang, Yuhao Qin, Zengxiang Wang, Zhen Bai, Zhigang Xiao, Zhi Qin","submitted_at":"2025-01-16T14:51:21Z","abstract_excerpt":"The neutron-neutron ($nn$) correlation function has been measured in 25 MeV/u $^{124}$Sn+$^{124}$Sn reactions.\n  Using the Lednick\\'y-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 $^{2}{\\rm H}(\\pi^{-},\\gamma)2n$, indicating heavy-ion collision"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.09576","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.09576/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}