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Publication  > Articles in Impacted Journals  > 'Gamma-ray flux in the Fréjus underground laboratory measured with NaI detector'
Gamma-ray flux in the Fréjus underground laboratory measured with NaI detector

Author
NEMO Collaboration  NEMO Collaboration

Year
2002

Scientific journal
Nucl. Instr. and Meth. in Phys. Res. A482 (2002) pp. 832-839


Abstract
The γ-ray flux in the Fréjus underground laboratory has been studied using an NaI detector surrounded by different diagonostic shields. Below 4 MeV, the spectrum is dominated by radioactivities in the surrounding materials and rocks. Between 4 and 6 MeV, the shape of the spectrum is well explained by U, Th and daughters, which are internal contaminations in the NaI crystal. Between 6 and 10 MeV, the γ-ray flux is strongly correlated with neutron captures in the surrounding materials. Finally, the γ-ray flux above 10 MeV falls off and is related to the very weak cosmic muon flux via muon bremsstrahlung.

Cite article as:
. NEMO Collaboration, "Gamma-ray flux in the Fréjus underground laboratory measured with NaI detector", Nucl. Instr. and Meth. in Phys. Res. A482 (2002) pp. 832-839 (2002)

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