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The neutron is the particle that undergoes those capture events resulting in fission.
The nucleus splits to form two or more smaller nuclei.
No. Fission is a process.
A stable nuclear fission reaction will be sustained if every fission produces one additional fission reaction.
Fission reactions are sustained by normal decay of radioactive material. All you need is a sufficient quantity of it in a small enough space and you can have a controlled or uncontrolled reaction. Fusion requires the collision of atoms at very high energies, something that is not easily done. That requires a particle accelerator or the blast from a fission reaction to achieve.
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.
The neutron is the particle that undergoes those capture events resulting in fission.
nuclear fission
A fission reaction in uranium requires neutrons.
The nucleus splits to form two or more smaller nuclei.
Uranium
No. Fission is a process.
The act of an atom splitting is called nuclear fission. In nuclear fission where we see neutrons emerge with fission fragments, and we then see those neutrons initiate other fission reactions is called a nuclear fission chain reaction.
A typical uranium fission event produces 2 to 3 neutrons. These neutrons are moderated (slowed down) and go on to initiate the fission of more uranium. On average, in a controlled reaction that is maintained at normal criticality (KEffective = 1), each fission creates exactly one neutron that is used to produce another fission.
A nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
A stable nuclear fission reaction will be sustained if every fission produces one additional fission reaction.
In a nuclear fission reaction, the nucleus of an atom is split into two smaller nuclei. This process releases a large amount of energy and typically involves the use of a neutron to initiate the reaction. The resulting smaller nuclei and additional neutrons can then go on to potentially initiate further fission reactions.