Probing the Earth's interior with the LENA detector

Details Probing the Earth's interior with the LENA detector Probing the Earth's interior with the LENA detector

2006-10-04

arxiv.org/abs/hep-ph/0610048v1

EarthMoonPlanets99:253-264,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures. Contributed to the proceedings of Neutrino Sciences 2005: Neutrino Geophysics, Honolulu, HI, 14-16 Dec 20

Scientific paper

10.1007/s11038-006-9111-9

A future large-volume liquid scintillator detector such as the proposed 50 kton LENA (Low Energy Neutrino Astronomy) detector would provide a high-statistics measurement of terrestrial antineutrinos originating from $\beta$-decays of the uranium and thorium chains. Additionally, the neutron is scattered in the forward direction in the detection reaction $\bar\nu_e+p\to n+e^+$. Henceforth, we investigate to what extent LENA can distinguish between certain geophysical models on the basis of the angular dependence of the geoneutrino flux. Our analysis is based on a Monte-Carlo simulation with different levels of light yield, considering an unloaded PXE scintillator. We find that LENA is able to detect deviations from isotropy of the geoneutrino flux with high significance. However, if only the directional information is used, the time required to distinguish between different geophysical models is of the order of severals decades. Nonetheless, a high-statistics measurement of the total geoneutrino flux and its spectrum still provides an extremely useful glance at the Earth's interior.

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