Probing the Earth's interior with a large-volume liquid scintillator detector

Kathrin A. Hochmuth, Franz v. Feilitzsch, Brian D. Fields, Teresa Marrodán Undagoitia, Lothar Oberauer, Walter Potzel, Georg G. Raffelt, Michael Wurm

Research output: Contribution to journalArticle

Abstract

A future large-volume liquid scintillator detector would provide a high-statistics measurement of terrestrial antineutrinos originating from β-decays of the uranium and thorium chains. In addition, the forward displacement of the neutron in the detection reaction over(ν, ̄)e + p → n + e+ provides directional information. We investigate the requirements on such detectors to 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 both unloaded and gadolinium-loaded scintillators. We find that a 50 kt detector such as the proposed LENA (Low Energy Neutrino Astronomy) will detect deviations from isotropy of the geoneutrino flux significantly. However, with an unloaded scintillator the time needed for a useful discrimination between different geophysical models is too large if one uses the directional information alone. A Gd-loaded scintillator improves the situation considerably, although a 50 kt detector would still need several decades to distinguish between a geophysical reference model and one with a large neutrino source in the Earth's core. However, a high-statistics measurement of the total geoneutrino flux and its spectrum still provides an extremely useful glance at the Earth's interior.

Original languageEnglish (US)
Pages (from-to)21-29
Number of pages9
JournalAstroparticle Physics
Volume27
Issue number1
DOIs
StatePublished - Feb 1 2007

Keywords

  • Geoneutrinos
  • Liquid scintillator detectors

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Fingerprint Dive into the research topics of 'Probing the Earth's interior with a large-volume liquid scintillator detector'. Together they form a unique fingerprint.

  • Cite this

    Hochmuth, K. A., Feilitzsch, F. V., Fields, B. D., Undagoitia, T. M., Oberauer, L., Potzel, W., Raffelt, G. G., & Wurm, M. (2007). Probing the Earth's interior with a large-volume liquid scintillator detector. Astroparticle Physics, 27(1), 21-29. https://doi.org/10.1016/j.astropartphys.2006.09.001