{"paper":{"title":"Measurement of the fast neutron background at the China Jinping Underground Laboratory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"2), (2) Institute of Nuclear Science, (3) Key Laboratory of Particle, (4) Institute of Physics, Academia Sinica, Beijing, Chang-Jian Tang (1), Chengdu, Department of Engineering Physics, Hao-Yang Xing (1), Henry T. Wong (4), Jing-Jun Zhu (2) ((1) College of Physical Science, Li Wang (3), Qiang Du (1, Qian Yue (3), Radiation Imaging (Ministry of Education), Shin-Ted Lin (1), Shu-Kui Liu (1), Sichuan University, Taipei), Technology, Tsinghua University, Wei-Wei Wei (2)","submitted_at":"2017-06-21T11:35:32Z","abstract_excerpt":"We report on the measurements of the fluxes and spectra of the environmental fast neutron background at the China Jinping Underground Laboratory (CJPL) with a rock overburden of about 6700 meters water equivalent, using a liquid scintillator detector doped with 0.5% gadolinium. The signature of a prompt nuclear recoil followed by a delayed high energy $\\gamma$-ray cascade is used to identify neutron events. The large energy deposition of the delayed $\\gamma$-rays from the $(n, \\gamma)$ reaction on gadolinium, together with the excellent n-$\\gamma$ discrimination capability provides a powerful "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.06831","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"}