{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T19:54:03Z","timestamp":1773518043288,"version":"3.50.1"},"reference-count":35,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2025,1,9]],"date-time":"2025-01-09T00:00:00Z","timestamp":1736380800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["11975317"],"award-info":[{"award-number":["11975317"]}]},{"name":"National Natural Science Foundation of China","award":["11975318"],"award-info":[{"award-number":["11975318"]}]},{"name":"National Natural Science Foundation of China","award":["12275363"],"award-info":[{"award-number":["12275363"]}]},{"name":"National Natural Science Foundation of China","award":["JCKY2022201C158"],"award-info":[{"award-number":["JCKY2022201C158"]}]},{"name":"National Natural Science Foundation of China","award":["BJ010261223282"],"award-info":[{"award-number":["BJ010261223282"]}]},{"name":"Key Laboratory of Nuclear Data Foundation","award":["11975317"],"award-info":[{"award-number":["11975317"]}]},{"name":"Key Laboratory of Nuclear Data Foundation","award":["11975318"],"award-info":[{"award-number":["11975318"]}]},{"name":"Key Laboratory of Nuclear Data Foundation","award":["12275363"],"award-info":[{"award-number":["12275363"]}]},{"name":"Key Laboratory of Nuclear Data Foundation","award":["JCKY2022201C158"],"award-info":[{"award-number":["JCKY2022201C158"]}]},{"name":"Key Laboratory of Nuclear Data Foundation","award":["BJ010261223282"],"award-info":[{"award-number":["BJ010261223282"]}]},{"name":"Continuous-Support Basic Scientific Research Project","award":["11975317"],"award-info":[{"award-number":["11975317"]}]},{"name":"Continuous-Support Basic Scientific Research Project","award":["11975318"],"award-info":[{"award-number":["11975318"]}]},{"name":"Continuous-Support Basic Scientific Research Project","award":["12275363"],"award-info":[{"award-number":["12275363"]}]},{"name":"Continuous-Support Basic Scientific Research Project","award":["JCKY2022201C158"],"award-info":[{"award-number":["JCKY2022201C158"]}]},{"name":"Continuous-Support Basic Scientific Research Project","award":["BJ010261223282"],"award-info":[{"award-number":["BJ010261223282"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>To fulfill the needs of neutron capture reaction cross-section measurement in the keV energy region in the field of nuclear astrophysics and advanced nuclear energy system development, the 4\u03c0 BaF_2 Gamma-Ray Total Absorption Facility (GTAF) developed by the Key Laboratory of Nuclear Data of the China Institute of Atomic Energy (CIAE) was transplanted and installed at the Back-streaming White Neutron Source (Back-n) of the China Spallation Neutron Source (CSNS) in 2019. A series of results has been achieved and published based on the GTAF since then, and it has been identified that the need of reducing backgrounds is becoming increasingly urgent. In order to understand the origins of backgrounds and to optimize the facilities, a detailed simulation program using GEANT4 toolkits was established and is presented in this paper. The symmetry in the geometric arrangement of the 4\u03c0 BaF2 detector array plays a critical role in ensuring uniform detection efficiency and accurate reconstruction of gamma-ray spectra, which is essential for neutron capture studies. To demonstrate the availability of the proven codes, several practical examples of assisting the process of experimental data and helping verify the optimization proposition are also shown in this paper.<\/jats:p>","DOI":"10.3390\/sym17010092","type":"journal-article","created":{"date-parts":[[2025,1,9]],"date-time":"2025-01-09T07:59:42Z","timestamp":1736409582000},"page":"92","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["GEANT4 Simulation of the Gamma-Ray Total Absorption Facility"],"prefix":"10.3390","volume":"17","author":[{"given":"Chong","family":"Zou","sequence":"first","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"},{"name":"China Shipbuilding Trading Co., Ltd., Beijing 100044, China"}]},{"given":"Guangyuan","family":"Luan","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Haotian","family":"Luo","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Qiwei","family":"Zhang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Jie","family":"Ren","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Xichao","family":"Ruan","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Hanxiong","family":"Huang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Zhaohui","family":"Wang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Guozhu","family":"He","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Jie","family":"Bao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Qi","family":"Sun","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Xiaoyu","family":"Wang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Mengxiao","family":"Kang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Jincheng","family":"Wang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Yingyi","family":"Liu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Haolan","family":"Yang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]},{"given":"Xuanbo","family":"Chen","sequence":"additional","affiliation":[{"name":"Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China"}]}],"member":"1968","published-online":{"date-parts":[[2025,1,9]]},"reference":[{"key":"ref_1","first-page":"2262","article-title":"Measurement of Neutron Radiation Capture Reaction Cross Section for Rhenium","volume":"58","author":"Wang","year":"2024","journal-title":"At. 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