Geoneutrinos from the rock overburden at SNO+
Abstract
SNOLAB is one of the deepest underground laboratories 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 x 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 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.
Cite
@article{arxiv.1808.03199,
title = {Geoneutrinos from the rock overburden at SNO+},
author = {Virginia Strati and Scott A. Wipperfurth and Marica Baldoncini and William F. McDonough and Sara Gizzi and Fabio Mantovani},
journal= {arXiv preprint arXiv:1808.03199},
year = {2018}
}