SNOLAB is one of the deepest underground laboratory in the world with an overburden of 2092 m. The SNO+ detector is designed to achieve several fundamental physics goals as a low-background experiment, particularly measuring the Earth's geoneutrino flux. Here we evaluate the effect of the 2 km overburden on the predicted crustal geoneutrino signal at SNO+. A refined 3D model of the 50 χ 50 km upper crust surrounding the detector and a full calculation of survival probability are used to model the U and Th geoneutrino signal. Comparing this signal with that obtained by placing SNO+ at sea level, we highlight a 1.4+1.8 -0.9 TNU signal difference, corresponding to the ∼5% of the total crustal contribution. Finally, the impact of the additional crust extending from sea level up to ∼300 m was estimated.
|ジャーナル||Journal of Physics: Conference Series|
|出版ステータス||Published - 2020 1月 20|
|イベント||15th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2017 - Sudbury, Canada|
継続期間: 2017 6月 24 → 2017 6月 28
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