Measurement of the neutron background at the Canfranc Underground Laboratory LSC

D. Jordan, J. L. Tain, A. Algora, J. Agramunt, C. Domingo-Pardo, M. B. Gomez-Hornillos, R. Caballero-Folch, G. Cortés, D. Cano-Ott, E. Mendoza, I. Bandac, A. Bettini, L. M. Fraile, C. Domingo

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The energy distribution of the neutron background was measured for the first time at Hall A of the Canfranc Underground Laboratory. For this purpose we used a novel approach based on the combination of the information obtained with six large high-pressure 3 He proportional counters embedded in individual polyethylene blocks of different size. In this way not only the integral value but also the flux distribution as a function of neutron energy was determined in the range from 1 eV to 10 MeV. This information is of importance because different underground experiments show different neutron background energy dependence. The high sensitivity of the setup allowed to measure a neutron flux level which is about four orders of magnitude smaller that the neutron background at sea level. The integral value obtained is ΦHall A =(3.44±0.35)×10 -6 cm -2 s -1 . © 2012 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1-6
JournalAstroparticle Physics
Publication statusPublished - 1 Jan 2013


  • Neutron background
  • Underground physics


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