Neutron temperature

The neutron temperature indicates a free neutron's energy, usually given in electron volts.

• 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.
• 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.

References

• Language of the Nucleus