Radiation DetectorsRADIATION TYPESFast neutrons rapidly degrade in energy by elastic collisions when they interact with low atomicnumber materials. As neutrons reach thermal energy, or near thermal energies, the likelihood ofcapture increases. In present day reactor facilities the thermalized neutron continues to scatterelastically with the moderator until it is absorbed by fuel or non-fuel material, or until it leaksfrom the core.Secondary ionization caused by the capture of neutrons is important in the detection of neutrons.Neutrons will interact with B-10 to produce Li-7 and He-4.10 1 74Bn LiHe5e5 0 3 2The lithium and alpha particles share the energy and produce "secondary ionizations" which areeasily detectable.Rev. 0 Page 9 IC-06
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