Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-11-12
Nucl.Instrum.Meth.A574:89-97,2007
Astronomy and Astrophysics
Astrophysics
22 pages including 10 figures; corrected typos, extended references and improved description; revised version accepted for pub
Scientific paper
10.1016/j.nima.2007.01.137
We present the design of an instrument capable of measuring the high energy ($>$60 MeV) muon-induced neutron flux deep underground. The instrument is based on applying the Gd-loaded liquid-scintillator technique to measure the rate of high-energy neutrons underground based on the neutron multiplicity induced in a Pb target. We present design studies based on Monte Carlo simulations that show that an apparatus consisting of a Pb target of 200 cm by 200 cm area by 60 cm thickness covered by a 60 cm thick Gd-loaded liquid scintillator (0.5% Gd content) detector could measure, at a depth of 2000 meters of water equivalent, a rate of $70\pm8$ (stat) events/year. Based on these studies, we also discuss the benefits of using a neutron multiplicity meter as a component of active shielding in such experiments.
Akerib Daniel S.
Hennings-Yeomans Raul
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