E(+)/e(-) discrimination in liquid scintillator and its usage to suppress he-8/li-9 backgrounds
文献类型：期刊论文
| 作者 | Cheng, Ya-Ping1,2; Wen, Liang-Jian2; Zhang, Peng2; Cao, Xing-Zhong2 |
| 刊名 | Chinese physics c
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000393254200016 |
| 出版者 | CHINESE PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.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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来源：高能物理研究所
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