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The neutron detection temperature, also called the neutron energy, indicates a free neutron 's kinetic energy, usually given in electron volts. The term temperature is used, since hot, thermal and cold neutrons are moderated in a medium with a certain temperature.pithermal neutrons have energies between 1 eV and 10 keV and smaller nuclear cross sections than thermal neutrons.
A thermal system is a multipart assembly of coupled components (some of them thermal), showing a common structured behaviour; e.g. a refrigerator is a combination of pipes, compressor, electric motor, heat exchangers, valves, insulation, casing, doors, lamp, etc., interacting to a common goal of cold production within.