Neutron Energy Distribution Ranges
the neutron energy ranges below are Retrieved from "An Introduction to the passage of energetic particles through matter" by N.J Carron:(year:2007) (page 308)
E: 0.0 ev - 0.025 ev --> Cold neutrons
E: 0.025 ev --> Thermal neutrons
E: 0.025 ev - 0.4 ev --> Epithermal neutrons
E: 0.4 ev - 0.6 ev --> Cadmium neutrons
E: 0.6 ev - 1 ev --> EpiCadmium neutrons
E: 1 ev - 10 ev --> Slow neutrons
E: 10 ev - 300 ev --> Resonance neutrons
E: 300 ev - 1 Mev --> Intermediate neutrons
E: 1 Mev - 20 Mev --> Fast neutrons
E: E> 20 Mev --> Relativistic neutrons
But different ranges with different names are observed in the articles. for example, in " Development of epithermal neutron camera based on resonance-energy-filtered imaging with GEM" article, by H. Tomita,a;1 C. Shoda,a J. Kawarabayashi,a T. Matsumoto,b J. Hori,c S. Uno,d M. Shoji,d T. Uchida,a N. Fukumotoa and T. Iguchia. year 2012, we can see this sentence : ((Epithermal neutrons have energies between 1 eV and 10 keV and smaller nuclear cross sections than thermal neutrons)) and you can see this classification that is mentioned below in this webpage: http://www.iem-inc.com/toolen6.html
Thermal Neutrons in thermal equilibrium with their surroundings Most probable energy at 20 degrees (C) - 0.025 eV; Maxwellian distribution of 20 degrees (C) extends to about 0.2 eV.
Epithermal Neutrons of energy greater than thermal Greater than 0.2 eV
Cadmium Neutrons which are strongly absorbed by cadmium Less than 0.4 eV
Epicadmium Neutrons which are not strongly absorbed by cadmium Greater than 0.6 eV
Slow Neutrons of energy slightly greater than thermal Less than 1 to 10 eV (sometimes up to 1 keV)
Resonance In pile neutron physics, usually refers to neutrons which are strongly captured in the resonance of U-238, and of a few commonly-used detectors (e.g., Indium, Gold, etc.) 1 eV to 300 eV
Intermediate Neutrons that are between slow and fast Few hundred eV to 0.5 MeV
Fast Greater than 0.5 MeV
Utrafast Relativistic Greater than 20 MeV
Pile Neutrons of all energies present in nuclear reactors 0.001 eV to 15 MeV
Fission Neutrons formed during fission 100 keV to 15 MeV (Most probable - 0.8 Mev; Average - 2.0 MeV)
Read more about this topic: Neutron Temperature
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