New measurement of the neutron-induced total cross-sections of ^(nat)Cr in a wide energy range on the Back-n at CSNS  

作　　者：Baoqian Li Min Xiao Yonghao Chen Jieming Xue Xinxiang Li Han Yi Pinjing Cheng Rong Liu Yiwei Yang Zijie Han Dajun Zhao Haoqiang Wang Jirong Zhao Peng Luan Jing Liu Zijun Liu Chaomin Chen Wen Luo Bo Zheng Song Feng 李宝钱;肖敏;陈永浩;薛洁明;李鑫祥;易晗;程品晶;刘荣;羊奕伟;韩子杰;赵大俊;王豪强;赵继荣;栾鹏;刘静;刘梓隽;陈朝敏;罗文;郑波;冯松(School of Nuclear Science and Technology,University of South China,Hengyang 421001,China;Institute of High Energy Physics,Chinese Academy of Sciences(CAS),Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523803,China;Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]School of Nuclear Science and Technology,University of South China,Hengyang 421001,China [2]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [3]Spallation Neutron Source Science Center,Dongguan 523803,China [4]Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China

出　　处：《Chinese Physics C》2024年第10期168-175,共8页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(12375296);the Educational Commission of Hunan Province,China(21A0281);the Youth Innovation Promotion Association CAS(2023014);the Key Laboratory of Nuclear Data Foundation(JCKY2022201C153);the Natural Science Foundation of Hunan Province,China(2024RC3205,2024JJ2044)。

摘　　要：The neutron total cross-section of ^(nat)Cr plays a crucial role in new nuclear engineering design and fundamental science.A new measurement of the neutron-induced total cross-sections of ^(nat)Cr was performed using the transmission method on the back-streaming white neutron beamline(Back-n)at the China Spallation Neutron Source(CSNS).The neutron energy was determined using the time-of-flight technique.The neutron total cross-sections of ^(nat)Cr were obtained across a broad energy range(0.3 eV−20 MeV)in one experiment for the first time.The resulting effective total cross-sections were compared with the existing experimental data in different energy ranges,which revealed good agreement with the evaluated libraries.Theoretical calculation of the total cross-section in the energy range of 1.5 to 20 MeV was then conducted using TALYS-1.96 and compared with the present results.The measurement provides a high-quality total cross-section of ^(nat)Cr,including detailed uncertainty data across a wide energy range,offering a valuable reference for nuclear data re-evaluation and nuclear engineering design.

关 键 词：neutron total cross-section natural chromium Back-n white neutron beamline NTOX 

分 类 号：O571.5[理学—粒子物理与原子核物理]