Neutron Flux Data At The
Gran Sasso Laboratory
Alessandro Rindi's Measurement*
Depth: 3950 m.w.e. Helium 3 Counters
Energy Bin Neutron Flux (1/10^6/cm^2/s)
0.025-0.3 eV 2.05 +/- 0.06
0.3-500 eV 1.28 +/- 0.31
500 eV-10 MeV 2.56 +/- 0.27
P. Belli's Measurment*
Depth: 3600 m.w.e. Boron Trifluoride Counters
Energy Bin Neutron Flux (1/10^6/cm^2/s)
0-0.05 eV 1.08 +/- 0.02
0.05-1000 eV 1.98 +/- 0.05
1 KeV-2.5 MeV 0.54 +/- 0.01
2.5-5 MeV 0.19 +/- 0.04
5-10 MeV 0.045 +/- 0.007
10-15 MeV (0.65 +/- 0.14)/10^3
15-25 MeV (0.1 +/- 0.3)/10^6


Neutron Flux Data At The
Stanford Underground Facility
A. Da Silva's Measurement*
Depth: 17 m.w.e. Boron Trifluoride Counter
Energy Bin Neutron Flux (1/10^6/cm^2/s)
All Energies > ~100 eV 81 +/- 6


Neutron Nomenclature
Energy Bin Name
0-0.025 eV Cold
0.025 eV Thermal
0.025-0.4 eV Epithermal
0.4-0.6 eV Cadmium
0.6-1.0 eV Epicadmium
1-10 eV Slow
10-300 eV Resonance
300 eV-1 MeV Intermediate
1-20 MeV Fast
>20 MeV Relativistic



References
*A. Rindi et al., Nuclear Instruments and Methods in Physics Research A 272 (1988) 871.
*P. Belli et al., Il Nuovo Cimento Vol. 101 A, N.6 (1989) 959.
*A. Da Silva et al., Nuclear Instruments and Methods in Physics Research A 354 (1995) 553.