地球中微子:来自地球深部的信使
文献类型：期刊论文
| 作者 | 李玉峰 ; Cao, Jun; He, Jincheng; Mao, Xin; 曹俊; Han, Ran; Niu, Yaoling; Li, Yufeng; Zhao, Liang; Li, Zhiwei
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| 刊名 | 科学通报
 |
| 出版日期 | 2018 |
| 卷号 | 63期号:27页码:2853-2862 |
| ISSN号 | 0023-074X |
| DOI | 10.1360/N972018-00444 |
| 其他题名 | Geo-neutrino: Messenger from the Earths interior |
| 文献子类 | Article |
| 英文摘要 | For half a century we have established with considerable precision the Earth's heat flow to be (47±2) TW. However, it remains under debate what fraction of this power comes from Earth's primordial heat and what fraction comes from the radiogenic heat. This debate comes from the uncertainties on the composition of the Earth, the question of chemical layering in the mantle, the nature of mantle convection, the energy required to drive plate tectonics, and the power source of the geodynamo. The surface heat flux, as measured in boreholes, provides limited insights into the relative contributions of primordial versus radiogenic sources of the mantle's heat budget. Geoneutrinos are unique probes that bring direct information about the amount and distribution of heat producing elements in the crust and mantle. Cosmochemical, geochemical, and geodynamic compositional models of the Bulk Silicate Earth (BSE) predicted different mantle neutrino fluxes. The flux of geo-neutrinos at any point on the Earth's surface is a function of the abundances and distributions of radioactive elements within our planet. In 2005, the KamLAND collaboration published the first experimental result about the geo-neutrino measurement, and then Borexino collaboration claimed the second. However the existing geo-neutrino detectors (KamLAND and Borexino) have not accumulated enough geo-neutrino data to discriminate models that parameterize the mantle convection and identify hidden reservoirs in the mantle. The particle physics community is trying to take a bold advantage of the development of the JUNO (Jiangmen Underground Neutrino Observatory). JUNO detector is a 20 kt liquid-scintillator, 20 times greater than KamLAND detector and 60 times greater than Borexino detector. The new JUNO detector will collect a much larger number of geo-neutrino signals, and thus have the potential to inform the geological community about the Earth's total geo-neutrino flux and details of the contribution from the region surround the detector. From those information, one can discriminate models of parameterized mantle convection, restrict the ratio of Th and U and also other potential question. To solve the above questions, the important for Chinese Geoscience is to develop a model to predict the geoneutrino signal at JUNO with high a precision and accuracy. This result from the geoscience community will inform the particle physics community of the expect crust geoneutrino signal at JUNO, while on the other hand the physicists will independently determine their total signal, which has relative contributions from the Earth, reactors, accidentals and detector. In the case that the physicists and geologists get different numbers, beyond uncertainties, the respective communities will necessarily reassess their models. Predicting the crust geoneutrino signal at JUNO demands that we accumulate the basic geological, geochemical and geophysical data for the regional area surrounding the detector. Experience tells us that in the continents the closest 500 km to the detector contributes half of the signal and it is this region that needs to be critically evaluated. This goal demands that the physical (density and structure) and chemical (abundance and distribution of Th and U) nature of the continent must be specified for the region. Doing so brings key fundamental benefits to the geoscience community. The main tasks include surveys and descriptions of the geology, seismology, heat flow, and geochemistry of the regional lithosphere. In addition to these survey studies it is vitally important to involve computational geological studies, where all of the geological, geophysical and geochemical data are geo-located into an integrated, 3-dimensional model that is the essential physical and chemical database. This paper presents the possibility and potential of a geo-neutrinos approach to a number of geoscience problems with state-of-the-art research in this area. It also discusses the JUNO and its many applications in the emerging research area of particle physics and earth sciences. © 2018, Science Press. All right reserved. |
| 电子版国际标准刊号 | 2095-9419 |
| 语种 | 中文 |
| CSCD记录号 | CSCD:6380074 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286976]  |
| 专题 | 中国科学院高能物理研究所 |
| 通讯作者 | 李玉峰 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | 李玉峰,Cao, Jun,He, Jincheng,等. 地球中微子:来自地球深部的信使[J]. 科学通报,2018,63(27):2853-2862. |
| APA | 李玉峰.,Cao, Jun.,He, Jincheng.,Mao, Xin.,曹俊.,...&ong.(2018).地球中微子:来自地球深部的信使.科学通报,63(27),2853-2862. |
| MLA | 李玉峰,et al."地球中微子:来自地球深部的信使".科学通报 63.27(2018):2853-2862. |
入库方式： OAI收割
来源：高能物理研究所
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