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Because of neutron multiplication ratio.....
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Why fission cannot take place with fast neutron?
In order to cause an atomic nucleus to become unstable so that it will undergo fission, you have to add a neutron. If a slow neutron collides with an atomic nucleus, it will be absorbed into the nucleus and become part of it. The nuclear attraction of the nucleus is strong enough to grab a slow neutron. But a fast neutron cannot be captured because it has too much kinetic energy. The attraction of the nucleus is not enough to stop the motion of a fast neutron. Even if a fast neutron makes a direct hit on an atomic nucleus, it is just going to bounce off.
Why nuclear fission take high temperature for a raection?
Not at all, the temperature of U-235 or Pu-239 which are used for nuclear energy production by fission, has no effect on the fission reaction, which is driven only by the capture cross-section for neutron capture. Slow neutrons are captured more strongly than fast ones, so it is an advantage for the moderator not to be at a high temperature.
What is the effect of ATP on the rate of ATP production?
Like all chemical reactions the production of ATP will slow down if there is more ATP are ready made.
Which safety feature works to slow down nuclear fission chain reactions?
control rods APEX USERS
Why moderator is not used in case of fast breeder reactor?
Moderator is not used in case of fast breeder reactor because there is no need to slow down neutron energy. Nuclear fission takes place at high energy of neutrons.
What is the splitting of a nucleus by a slow moving neutron?
nuclear fission
Does fuel rods slow down nuclear reactions?
No, but control rods do.
How does marijuana effect your reactions?
You become slow and stupid.
Who won the 1938 Nobel Peace Prize in physics?
A native from Italy, Enrica Ferni - for demonstrating the existence of radioactive elements produced for neutron irradiation. Enrico Fermi Italy "for his demonstrations of the existence of new radioactive elements produced by neutron irradiation, and for his related discovery of nuclear reactions brought about by slow neutrons"
Why did Enrico Fermi win The Nobel Prize in Physics in 1938?
The Nobel Prize in Physics 1938 was awarded to Enrico Fermi for his demonstrations of the existence of new radioactive elements produced by neutron irradiation, and for his related discovery of nuclear reactions brought about by slow neutrons.
What does neutron absorbtion accomplish in a nuclear reactor?
It is the absorption or capture of slow neutrons by the uranium nucleus that causes it to fission and release energy, so it is the essential factor that makes nuclear energy work
Why you use slow neutrons instead of fast neutrons in nuclear reaction?
in reacter U-235 fission is due to slow neutrons because in reacter the probability of fission from fast neutron is approximatly zero.
Why fission cannot take place with fast neutron?
In order to cause an atomic nucleus to become unstable so that it will undergo fission, you have to add a neutron. If a slow neutron collides with an atomic nucleus, it will be absorbed into the nucleus and become part of it. The nuclear attraction of the nucleus is strong enough to grab a slow neutron. But a fast neutron cannot be captured because it has too much kinetic energy. The attraction of the nucleus is not enough to stop the motion of a fast neutron. Even if a fast neutron makes a direct hit on an atomic nucleus, it is just going to bounce off.
Neptunium can be made by bombarding uranium with?
Slow moving neutrons. The nuclear reactions are: 23892U + n-------23992U-------23993Np + e--------23994Pu + e
What is it called when unstable nuclear atoms are split unto two?
either atomic decomposition or nuclear fission, fission being a uranium-235 or other such isotope having a slow moving neutron fired into it's nucleus.
Why nuclear fission take high temperature for a raection?
Not at all, the temperature of U-235 or Pu-239 which are used for nuclear energy production by fission, has no effect on the fission reaction, which is driven only by the capture cross-section for neutron capture. Slow neutrons are captured more strongly than fast ones, so it is an advantage for the moderator not to be at a high temperature.
When a green plant absorbs a toxic substance which inhibits the Calvin cycle How would this most likely affect the light reactions?
The light reactions would slow down.
