Neutron Temperature - Neutron Energy Distribution Ranges

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

Famous quotes containing the words energy and/or distribution:

    Just as we need to encourage women to test life’s many options, we need to acknowledge real limits of energy and resources. It would be pointless and cruel to prescribe role combination for every woman at each moment of her life. Life has its seasons. There are moments when a woman ought to invest emotionally in many different roles, and other moments when she may need to conserve her psychological energies.
    Faye J. Crosby (20th century)

    In this distribution of functions, the scholar is the delegated intellect. In the right state, he is, Man Thinking. In the degenerate state, when the victim of society, he tends to become a mere thinker, or, still worse, the parrot of other men’s thinking.
    Ralph Waldo Emerson (1803–1882)