Measurements of the lifetime of orthopositronium in the LAB-based liquid scintillator of JUNO
文献类型：期刊论文
| 作者 | Schwarz, M; Franke, SM; Oberauer, L; Plein, MD; Steiger, HTJ; Tippmann, M |
| 刊名 | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
 |
| 出版日期 | 2019 |
| 卷号 | 922 |
| 关键词 | Positronium Liquid scintillation detectors |
| DOI | 10.1016/j.nima.2018.12.068 |
| 文献子类 | Article |
| 英文摘要 | Electron antineutrinos are detected in organic liquid scintillator based neutrino experiments by means of the inverse beta decay, producing both a positron and a neutron. The positron may form a bound state together with an electron, called positronium (Ps). The longer-lived spin state of Ps, orthopositronium (o-Ps) has a lifetime of about 3 ns in organic liquid scintillators (LS). Its formation changes the time distribution of photon emission, which affects positron reconstruction algorithms and allows the application of pulse shape discrimination (PSD) to distinguish electron from positron events. In this work we measured the lifetime tau(2) and formation probability I-2 of o-Ps in the linear alkylbenzene (LAB) based LS of the JUNO (Jiangmen Underground Neutrino Observatory) experiment including wavelength shifters, obtaining tau(2) = 2.98 ns +/- 0.05 ns and I-2 = 44% +/- 3%. We are using a novel type of setup, which allows for additional means of background suppression compared to commonly used PALS (positron annihilation lifetime spectroscopy) measurement setups. |
| 语种 | 英语 |
| WOS记录号 | WOS:000457980800007 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/297547]  |
| 专题 | 江门中微子实验 |
| 推荐引用方式 GB/T 7714 | Schwarz, M,Franke, SM,Oberauer, L,et al. Measurements of the lifetime of orthopositronium in the LAB-based liquid scintillator of JUNO[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2019,922. |
| APA | Schwarz, M,Franke, SM,Oberauer, L,Plein, MD,Steiger, HTJ,&Tippmann, M.(2019).Measurements of the lifetime of orthopositronium in the LAB-based liquid scintillator of JUNO.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,922. |
| MLA | Schwarz, M,et al."Measurements of the lifetime of orthopositronium in the LAB-based liquid scintillator of JUNO".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 922(2019). |
入库方式： OAI收割
来源：高能物理研究所
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