Table 10 Summary of neutron fluxes in LSM. Table 10
Related Figures (11)
Activity of primordial radionuclides in rock and concrete samples collected in LSM. * Calculated using conversion factors. Table 2 3.1. Gamma-ray background Concentrations of elements in rock and concrete samples collected in LSM. Table 1 The main gamma-ray fluxes measured in LSM. Table 4 Table 3 Summary of measured and simulated neutron fluxes in LSM. atmosphere and subsequently travel and propagate through the air and rocks. The LSM overburden attenuates the muon flux, ®, ~5 p m~?d7! (Kluck, 2015; Loaiza, 2005; Fiorucci et al., 2007). More precise values of the LSM muon flux were measured by Berger et al. (1989) (®, = 4.73 » m-2d~1), and by the EDELWEISS dark matter collaboration (® = 5.4+0.2 m~2d7!; Schmidt et al., 2013). For comparison, the total flux of the muon component of cosmic rays at sea level is ~190 pm~?s"! (Povinec et al., 2008). Neutron yields from (a, n) reactions in given materials. Fig. 1. Location of the LSM. Neutron yields from each isotope in target elements. Fig. 2. Neutron energy spectra from *°8U and 73*Th induced (a, n) reactions in selected target elements. Fig. 3. Dependence of neutron yield on the muon energy in target materials (data from Kluck (2015), Gorshkov et al. (1974), Gorshkov and Zyabkin (1971), Gorshkov and Zyabkin (1968), Annis et al. (1954), Agafonova and Malgin (2013), Bergamasco et al. (1973), Reichhart et al. (2013)). Muon induced neutron fluxes in LSM for Fe and Pb shielding materials. Table 9
