Neutron capture cross-section measurement and extraction of neutron resonance parameters at 1-500 eV for <sup>109</sup>Ag

XIE Wen; CHE Guoliang; JIANG Wei; DONG Gaoyang; WENG Chuxuan; JIANG Xin; LI Xinxiang; FENG Song; JIANG Bing; REN Jie; LIN Ziang; YING Mingyang; JIANG Ting; HE Rui; WANG Hongwei; FAN Gongtao; LIU Longxiang; ZHANG Yue; HAO Zirui; ZHANG Suyalatu; WANG Dexin; LUO Wen

doi:10.7498/aps.75.20251270

Abstract
¹⁰⁹Ag located on the path of the slow neutron capture process, and 79% of ¹⁰⁹Ag is generated via the rapid neutron capture process.Meanwhile, the mass fraction of ¹⁰⁹Ag in Ag-In-Cd control rods is 38.56%. Therefore, the neutron capture cross-section of ¹⁰⁹Ag is crucial for both nuclear energy and nuclear astrophysics applications.In this work, a neutron capture cross-section measurement was performed using a ¹⁰⁹Ag isotope target at the Back-n white neutron facility of the CSNS. Neutron capture cross-section in the 1-500 eV energy region were obtained by combining the time-of-flight method and the pulse-height weighting technique. The ¹⁰⁹Ag resonance energy, neutron resonance width, and gamma resonance width parameters were extracted using the SAMMY code, which is based on R-matrix theory. The neutron resonance parameters extracted from this study at 139.4 eV are in agreement with the values in the JENDL-4.0 evaluation, while those at 169.9 eV and 328.1 eV agree with the JEFF-4.0 evaluation. Additionally, the result at 259.3 eV is consistent with the CENDL-3.2 evaluation.The datasets presented in this paper are openly available at https://www.doi.org/10.57760/sciencedb.j00213.00197 (Please use the private access link https://www.scidb.cn/s/RNfUnq to access the dataset during the peer review process)

Keywords:
neutron capture cross-section /

white neutron source /

resonance parameter
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