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Neutrons from fission have a natural energy of about 2 Mev. In a thermal reactor these are slowed to thermal equilibrium by a moderator, at about 0.025 ev.
At these lower energies (= slower speeds) we have more time to have them react with a measuring device, commonly a particle detector. Or a scintillation detector with associated light detector..
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What uranium nucleus is fissile?
The isotopes 233U and 235U are fissile with thermal neutrons and the isotope 238U is fissile with fast neutrons.
The uranium 238 atom can be triggered to split when its struck by a?
By neutrons; bu the cross specific area is very small for thermal neutrons.
What is fissile nucleus?
a thermal slow neutrons that will fission by a chain reaction of the nutrons.
Chain reaction results when a uranium atom is struck by?
Thermal neutrons
What make Uranium fission?
Uranium (especialy the fissile isotope) 235U is fissionable by bombardments with thermal neutrons.
Differences in thermal energy can be detected with?
infrared imagery
Uranium 235 can be split if its hit by what?
Thermal neutrons with an energy of 0,025 eV
What is η?
It is the thermal regeneration factor. It is greater than one. It is ratio of neutrons generated in the fuel to the absorbed neutrons.
What is the difference between photon detector and thermal detector?
The wavelength of the detected signal.
What is fissile?
a thermal slow neutrons that will fission by a chain reaction of the nutrons.
What uranium nucleus is fissile?
The isotopes 233U and 235U are fissile with thermal neutrons and the isotope 238U is fissile with fast neutrons.
What does thermal indicates in thermal neutrons?
A thermal neutron has much less energy / velocity than a fast neutron. As a result, it has a much larger neutron absorption cross section, making it easier for it to be absorbed by certain nuclei and subsequently initiate fission. The fast neutrons that result from fission are slowed down, i.e. moderated, usually by water, in order to become thermal neutrons and to sustain the fission chain reaction.
The uranium 238 atom can be triggered to split when its struck by a?
By neutrons; bu the cross specific area is very small for thermal neutrons.
What Differences in thermal energy can be detected with?
infrared imagery
What is fissile nucleus?
a thermal slow neutrons that will fission by a chain reaction of the nutrons.
Is the detection of neutrons dependent on the energy of the neutrons?
Yes. There are different kinds of detectors for neutrons. Some are better at detecting high energy neutrons, and some are better at detecting thermal neutrons. There is no detection method that is equally good for detecting neutrons at all energy levels.
What has the author Ludwik Dobrzynski written?
Ludwik Dobrzynski has written: 'Neutrons and solid state physics' -- subject(s): Scattering, Thermal neutrons
