Neutron temperature

  The neutron temperature, also called the neutron energy, indicates a De Broglie relation. Moderated and other, non-thermal neutron energy distributions or ranges are listed in the table below:

• Fast neutrons have an energy greater than 1 eV, 0.1 MeV or approximately 1 MeV, depending on the definition.
• Slow neutrons have an energy less than 1 eV.
• Epithermal neutrons have an energy from 0.025 to 1 eV.
• Hot neutrons have an energy of about .2 eV.
• Thermal neutrons have an energy of about 0.025 eV.
• Cold neutrons have an energy from 5x10^-5 eV to 0.025 eV.
• Very cold neutrons have an energy from 2x10^-7 eV to 5x10^-5 eV.
• Ultra cold neutrons have an energy less than 2x10^-7 eV.
• Continuum region neutrons have an energy from 0.01 MeV to 25 MeV.
• Resonance region neutrons have an energy from 1 eV to 0.01 MeV.
• Low energy region neutrons have an energy less than 1 eV.