A neutron in thermal equilibrium with its surroundings. Compare with slow neutron.
- It is usually the case in neutron activation analysis that both unknown samples and standard materials containing known elemental concentrations are irradiated with thermal neutrons in a nuclear reactor.
- The normalizing factor for exposure to alpha particles is 20, for thermal neutrons is two, for fast neutrons is 10, for protons is 10, and for beta particles is one.
- In the thermal type of power reactor, the neutrons are slowed to become thermal neutrons, and the number of fissile nuclei is less than the number consumed in fission; the ‘breeding’ process is therefore not self-supporting.
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Syllabification: ther·mal neu·tron
Definition of thermal neutron in:
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