Development of a polarized ~3He neutron spin filter based on spin exchange optical pumping at China Mianyang Research Reactor  

作　　者：Song Yan Mo-Fan Zhang Wen-Chuan Guo Wen-Zhao Wang Jian Gong Tian-Jiao Liang Ben-Qiong Liu Mei Peng Shu-Ming Peng GuanAi Sun Xiao-Qing Tu Hai-Yang Yan Jian-Hua Zhang Hao Zheng 

机构地区：[1]Key Laboratory of Neutron Physics,Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China [2]Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China [3]Department of Physics,Beijing Jiaotong University,Beijing 100044,China [4]ABeijing Computational Science Research Center,Beijing 100142,China [5]Dongguan Neutron Science Center,Dongguan 523803,China [6]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2019年第10期119-122,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.91636103,11675152,and 11875238);the National Key Program for Research and Development(Grant No.2016YFA0401504)

摘　　要：Spin-polarized^3He gas is widely used in many research areas.It is used to search for new spin-dependent interactions beyond the standard model[1,2].It works as a target for electron scattering when studying the spin structure of neurons in high-energy and nuclear physics[3].Also,it works as a neutron spin filter(NSF)for polarizing/analyzing neutron polarizations in scattering experiments[4-7].One of the advantages of neutron scattering is that the neutron has a magnetic moment;thus,it can detect a magnetic structure with high sensitivity.If the neutrons are polarized,this advantage can be greatly improved because polarized neutron scattering techniques can easily differentiate between magnetic and nuclear scattering.By comparison,it is not very easy for other techniques such as X-ray scattering to separate magnetic interactions from electrical ones in magnetic samples because the latter is usually much stronger than the former.Furthermore,by encoding energy change and scattering angle information into precessions of the neutron polarization,the energy and angle resolutions for scattering can be significantly increased using the so-called spin echo techniques.

关 键 词：POLARIZED latter EXCHANGE 

分 类 号：O57[理学—粒子物理与原子核物理]