| 释义 |
fast neutron
fast neutron n (General Physics) physics a. a neutron produced by nuclear fission that has lost little energy by collision; a neutron with a kinetic energy in excess of 0.1 MeVb. a neutron with a kinetic energy in excess of 1.5 MeV, the fission threshold of uranium-238 fast neutron
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). |