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	E(+)/e(-) discrimination in liquid scintillator and its usage to suppress he-8/li-9 backgrounds
	Cheng, Ya-Ping1,2; Wen, Liang-Jian2; Zhang, Peng2; Cao, Xing-Zhong2
刊名	Chinese physics c
	2017
卷号	41期号:1页码:6
关键词	Psd Ls Ortho-positronium
ISSN号	1674-1137
DOI	10.1088/1674-1137/41/1/016101
通讯作者	Cheng, ya-ping(chengyp@mail.ihep.ac.cn)
英文摘要	Reactor neutrino experiments build large-scale detector systems to detect neutrinos. in liquid scintillator, a neutral bound state of a positron and an electron, named positronium, can be formed. the spin triplet state is called ortho-positronium (o-ps). in this article, an experiment is designed to measure the lifetime of o-ps, giving a result of 3.1 ns. a psd parameter based on photon emission time distribution (petd) was constructed to discriminate e(+)/e(-). finally, the application of e(+)/e(-) discrimination in the juno experiment is shown. it helps suppress he-8/li-9 backgrounds and improves the sensitivity by 0.6 in chi(2) analysis with an assumption of sigma=1 ns pmt transit time spread, which will bring a smearing effect to the petd.
WOS关键词	LIFETIME
WOS研究方向	Physics
WOS类目	Physics, Nuclear ; Physics, Particles & Fields
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000393254200016
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2176834
专题	高能物理研究所
通讯作者	Cheng, Ya-Ping
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Ya-Ping,Wen, Liang-Jian,Zhang, Peng,et al. E(+)/e(-) discrimination in liquid scintillator and its usage to suppress he-8/li-9 backgrounds[J]. Chinese physics c,2017,41(1):6.
APA	Cheng, Ya-Ping,Wen, Liang-Jian,Zhang, Peng,&Cao, Xing-Zhong.(2017).E(+)/e(-) discrimination in liquid scintillator and its usage to suppress he-8/li-9 backgrounds.Chinese physics c,41(1),6.
MLA	Cheng, Ya-Ping,et al."E(+)/e(-) discrimination in liquid scintillator and its usage to suppress he-8/li-9 backgrounds".Chinese physics c 41.1(2017):6.

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