At NPL well-characterised mono-energetic neutron fields covering the greater part of the energy range 50 keV to 5 MeV are routinely available for the calibration of neutron sensitive devices or for irradiation purposes.
Energies just above and below this range can also be produced for special applications.
ISO recommended energies
Neutron energy (MeV) | Reaction | Approximate maximum rates at 1m | |
Fluence (cm-2s-1) | Ambient dose equivalent (μSvh-1) | ||
0.144 | 7LI (p,n) 7Be | 1 x 102 | 450 |
0.250 | 7LI (p,n) 7Be | 6 x 102 | 440 |
0.565 | 7LI (p,n) 7Be | 1.6 x 103 | 2000 |
1.2 | T (p,n) 9He | 2 x 102 | 300 |
2.5 | T (p,n) 9He | 6 x 102 | 900 |
5.0 | D (d,n) 9He | 6 x 102 | 880 |
Please note that:
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