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Cosmic ray induced neutrons and muons cause the activation of nuclei. Using low-background detectors, constructed with strictly selected materials and sufficient shielding from the surrounding environmental gamma radiation, it is possible to measure the activation products and deduce information about the flux of neutrons and muons. The results can be used to improve the shielding for ultra-low counting spectrometry systems. In this work two low-level HPGe detection systems have been used to study the thermal and fast neutron fluxes, as well as the muon flux at three different experimental sites: on the surface, at a depth of 15 m water equivalent (mwe) and at 500 mwe. The muons are identified by their high energy deposition in the detector crystal. The results are discussed and compared to the values obtained by the Kiel neutron monitor since 1985.

Additional information

Authors: WORDEL R, JRC Geel (BE);MOUCHEL D, JRC Geel (BE);ALTZITZOGLOU T, JRC Geel (BE);HEUSSER G, Max-Planck-Institut für Kernphysik, Heidelberg (DE);QUINTANA ARNES B, Universitad de Salamanca (ES);MEYNENDONCKX P, SCK/CEN, Mol (BE)
Bibliographic Reference: Paper presented: International Symposium on Radionuclide Metrology and its Application, Paris (FR), May 15-19, 1995
Availability: Available from (1) as Paper EN 39029 ORA
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