Geoneutrinos and reactor antineutrinos at SNO+

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Baldoncini, M.^1,2 ; Strati, V.^1,3 ; Wipperfurth, S.A.^4 ; Fiorentini, G.^1,2,3 ; Mantovani, F.^1,2 ; McDonough, W.F.^4 ; Ricci, B.^1,2

University of Ferrara, Department of Physics and Earth Sciences, Ferrara, Italy^1

INFN, Ferrara Section, Ferrara, Italy^2

INFN, Legnaro National Laboratories, Legnaro, Italy^3

Department of Geology, University of Maryland, College Park

MD, United States^4

关键词: Direct measurement;    Electron antineutrinos;    Geo-neutrinos;    Long-baseline experiments;    Natural uranium;    Spectral shapes;    Sudbury basins;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/6/062003/pdf
DOI  :  10.1088/1742-6596/718/6/062003

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

In the heart of the Creighton Mine near Sudbury (Canada), the SNO+ detector is foreseen to observe almost in equal proportion electron antineutrinos produced by U and Th in the Earth and by nuclear reactors. SNO+ will be the first long baseline experiment to measure a reactor signal dominated by CANDU cores (∼55% of the total reactor signal), which generally burn natural uranium. Approximately 18% of the total geoneutrino signal is generated by the U and Th present in the rocks of the Huronian Supergroup-Sudbury Basin: the 60% uncertainty on the signal produced by this lithologic unit plays a crucial role on the discrimination power on the mantle signal as well as on the geoneutrino spectral shape reconstruction, which can in principle provide a direct measurement of the Th/U ratio in the Earth.