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When a nucleus absorbs a neutron and then breaks apart there are many products of the reaction Which of these is not a product of a nuclear fission reaction?
TDIXON123
Uranium-235
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∙ 12y ago
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What is meant by chain reaction in nuclear reactor?
Basically a chain reaction (nuclear or chemical) is a self sustaining auto-catalytic reaction.In a nuclear reactor it is a neutron chain reaction, where each neutron released in every fission event can trigger another fission event. In a nuclear reactor the excess neutrons must be disposed of, which is the purpose of the control rods so that the reaction can be kept at some desired constant rate.
What is neutron moderation used to counteract against?
the minimal chance that newly formed neutrons of a fission reaction are absorbed by more atoms. (apex)
Where is technetium obtained from?
Technetium is an artificial chemical element and is extracted from fission products, prepared by neutron activation or by irradiation in particles accelerators.
How does the uranium and plutonium react in the nuclear reactor?
To set off a fission reaction (the reaction that occurs in a nuclear reactor), a person must first pump a neutron into a heavy nucleus. So if a neutron is pumped into a uranium or plutonium nucleus capable of undergoing fission, the nucleus splits in two, and releases more neutrons, which hit more nuclei, which in turn send out even more neutrons, thus setting off a chain reaction where every time a neutron hits a nucleus, the nucleus splits in two and sends out more neutrons.
What are neutron-rich nuclei?
Neutron-rich nuclei could be said to be atomic nuclei that have a large number of neutrons. The term, however, is generally used in conjunction with the physics of nuclear fission, or the nuclear chain reaction. Fission relies on the production of neutrons to build or maintain the chain reaction (depending on the application - reactor or bomb). Neutrons are let loose in nuclear fission. But if some other materials can be included in the construction of the fission device so that they, too, contribute neutrons to help build the chain, then that would be helpful. (That's what the German heavy water project was all about.) Generally, neutron-rich nuclei are atomic nuclei that can contribute, can add to, the number of neutrons available to support a chain reaction.
When a nucleus absorbs a neutron and then breaks apart there are many products of the reaction . Which of these is not a product of a nuclear fission reaction?
Uranium-235
In a nuclear fission reaction a freely moving neutron?
In a nuclear fission reaction, a freely moving neutron undergoes neutron capture and initiates the nuclear fission of a fuel atom.
What is the bullet that starts a fission reaction?
A neutron.
A nuclear fission reaction occurs when a U-235 nucleus is bombarded by a neutron the products are xe 143 3 neutrons and a strontium isotope?
There are many fission products, see the Wikipedia entry for 'Fission Product Yield'
What does nuetron absorption accomplish in a nuclear reactor?
Neutron absorption is the key to the operation of a nuclear reactor as this is what perpetuates the chain reaction. Neutrons can be absorbed by a number of things within the core of an operating reactor, but when a fuel atom absorbs a neutron, it becomes unstable and fissions. The fission event releases fission fragments, energy, and more neutrons, which will, when absorbed, continue the chain reaction.
What controls the fission reaction within a reactor core?
High neutron capture elements (e.g Boron, Cadmium ) are used to control fission reaction.
How is a chain reactor controlled?
Since the continued chain reaction of a nuclear fission reactor depends upon at least one neutron from each fission being absorbed by another fissionable nucleus, the reaction can be controlled by using control rods of material which absorbs neutrons. Cadmium and boron are strong neutron absorbers and are the most common materials used in control rods. A typical neutron absorption reaction in boron is In the operation of a nuclear reactor, fuel assemblies are put into place and then the control rods are slowly lifted until a chain reaction can just be sustained. As the reaction proceeds, the number of uranium-235 nuclei decreases and fission by- products which absorb neutrons build up. To keep the chain reaction going, the control rods must be withdrawn further. At some point, the chain reaction cannot be maintained and the fuel must be replenished
What is a prompt fission?
A prompt fission is a fission that results from the immediate interaction, i.e. a prompt interaction, from a preceding interaction. There is no delay, or more correctly, neutron moderation, or any other intervening reaction, in a prompt fission reaction.
What particle is used to start nuclear fission?
In actuality, a spontaneous fission event begins a nuclear chain reaction. It kick starts a nuclear chain reaction. And a neutron from that fission will initiate another fission to continue and rev up that nuclear chain reaction.
What helps control the fission reaction in a nuclear plant?
The fission reaction is controlled through use of high neutron capture material as Boron, Gadolinium, Cadmium, ... etc.
What does initiation of nuclear weapons mean?
starting the fission neutron chain reaction using some kind of pulsed neutron source.
What is a fission nuclear reaction?
The primary result of a fission reaction is the conversion of mass to energy. In fission, the nucleus split, either through radioactive decay or as result of being bombarded by other subatomic particles known as neutrons.
