fast neutron


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Related to fast neutron: slow neutrons

fast neutron

[¦fast ′nü‚trän]
(nucleonics)
A neutron having energy much greater than some arbitrary lower limit (that may be only a few thousand electronvolts).
References in periodicals archive ?
In January 1939, the Austrian-German <<tandem>> of physicists Otto Frisch and Lisa Meitner, interpreting the results of a nuclear experiment conducted in December 1938 by German scientists Otto Hahn and Fritz Strassmann, concluded that in the natural uranium [sub.92][sup.238]U the nuclear reaction of dividing the <<mother>> nuclei of its[sub.92][sup.238]U isotope into two fragments with their <<daughter>> nuclei and the emission of several fast neutrons [3, 10].
As expected this combination enhanced the fast neutron spectrum component as well as the neutron flux within the irradiation space.
However, the small fast neutron cross section with carbon resulted in a minute contribution to the overall observed response [41].
The topic of the present work is the use the [sup.19]F(n,[alpha])[sup.16]N reaction [7] to detect fast neutrons with energies [E.sub.n] > 3 MeV.
Table 1 tabulated available measuring energy with different ranges for different authors [21-31] with corresponding cross section and their errors are recorded in EXFOR library for fast neutron collected for Zr(A=90 and 96) target elements for (n,2n) reaction.
Power units with fast neutron reactors, or simply fast reactors, can significantly expand the fuel base of nuclear energy and minimize nuclear waste due to a closed nuclear fuel cycle.
The macroscopic fast neutron removal cross section of the borate glasses is given in the Table 5.
Thorium-based fuels could generate power in heavy-water reactors, high-temperature gas-cooled reactors, boiling and pressurised light-water reactors, and fast neutron reactors.
The fast neutron therapy programme for patients in South Africa should come to an end.
An experimental fast neutron reactor in China has begun generating electricity that enters the grid, according to Xinhua, the country's official news agency.
In the typical reactor, fast neutron are slowed down by moderators to increase the probability of collision between these slow neutrons and the fissile 235U nucleus, and thus increase the amount of energy generated by fission.
If D or T molecules are combined chemically with one oxygen atom we get heavy water which is used as stopper of fast neutron in fission reactors, so that fissionable uranium ( ) can be broken by the stopped neutrons usually known as slow neutrons.