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When one fission reaction instigates more than on fission reaction it is called?
Wiki User
∙ 10y ago
A runaway chain reaction.
It is called super criticality, with KEffective > 1.
When one fission reaction instigates more than one or more fission reactions it is called a Chain Reaction.
KEffective is the neutron multiplication factor which is an indication of whether a reaction is stable (=1), increasing (>1), or decreasing (<1). Related to this is the reactor period, which is the time it take for the power to change by a factor of e, 2.71828. At KEffective = 1, period is infinity, so the power is stable.
In a weapon, KEffective is almost 2.5, because the average number of neutrons released per fission event is 2.5. In this case, if each neutron causes another fission event, the reactor period is extremely short, on the order of milliseconds, or even shorter, and the power becomes extremely large in a very short period of time.
Complicating this is the tendency for the core to become subcritical (KEffective < 1) due to thermal or density change, which is why the "art" of nuclear weapon design is more involved in how to hold the core together, than it is in actually assembling the core.
Kasandra Hegmann
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What term describes the reaction process in a fission reaction?
another name for nuclear fission is: E=MC squared
Which of the following is the name given to a situation in which one fission reaction innstigates exactly one more fission reaction?
A runaway chain reaction.It is called super criticality, with KEffective > 1.When one fission reaction instigates more than one or more fission reactions it is called a Chain Reaction.KEffective is the neutron multiplication factor which is an indication of whether a reaction is stable (=1), increasing (>1), or decreasing (
Nuclear power plants generate electricity from?
Radioactivity more precisely fission chain reaction
Why does a fission reaction occur more readily than a fusion 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.
Why fusion reaction are more energetic than fission reactions?
Nuclear fission does not produce more energy than nuclear fusion. In nuclear fusion (6.4 MeV) per nucleon is given out which is much greater than the energy given out per nucleon (1 MeV) during a nuclear fission reaction.
What is it called when one fission reaction instigate exactly one more fission reaction?
It is called criticality, with KEffective = 1. controled
When one fission reaction instigates more than one fission reaction it is called .?
A runaway chain reaction.It is called super criticality, with KEffective > 1.When one fission reaction instigates more than one or more fission reactions it is called a Chain Reaction.KEffective is the neutron multiplication factor which is an indication of whether a reaction is stable (=1), increasing (>1), or decreasing (
What term describes the reaction process in a fission reaction?
another name for nuclear fission is: E=MC squared
If For a sustainable fission reaction each fission must produce exactly how many additional fission reaction(s).?
To sustain a fission chain reaction, each fission reaction must result in one more fission reaction. And that one should result in one more, and so on.
Which of the following is the name given to a situation in which one fission reaction innstigates exactly one more fission reaction?
A runaway chain reaction.It is called super criticality, with KEffective > 1.When one fission reaction instigates more than one or more fission reactions it is called a Chain Reaction.KEffective is the neutron multiplication factor which is an indication of whether a reaction is stable (=1), increasing (>1), or decreasing (
An ongoing series of fission reactions is called a (n) .?
Fission and fusion reactions are chain reactions but in different ways. In fission reaction a heavy nuclei is bombarded with a slow moving neutron and this nuclei breaks to produce more such neurons along with generation of new elements. These slow moving neutrons are further used to carry out fission of more such nuclei. This is chain reaction. Fusion reaction are a different class of nuclear reaction in which small nuclei fuse together to produce bigger nuclei along with the generation of energy due to mass defect.. In fusion reaction lot of energy is produced and this energy is used to carry out further reaction. Thus both can be called series reaction.
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.
The process is which each split atom gives up neutrons which in turn split other atoms and so on is called?
This is a nuclear fission chain reaction. An atom of fissile material spontaneously splits (fissions), and neutrons released in this fission event initiate other fission events. Still more neutrons are released, and they cause more fissions, and a chair reaction is under way.a nuclear reactionit is called a chain reaction.chain reaction
Atoms with mass greater than 60 where the nuclei fragment or break apart into several smaller nuclei called?
The nuclides resulting from a fission reaction are known as fission products, or more generally as daugher nuclides.
What is true about the fission of uranium235?
The reaction produces more neutrons than were needed to start it.
How is hydrogen changed into helium in nuclear fission?
Hydrogen is not changed into helium in nuclear fission. In nuclear physics, nuclear fusion is a reaction in which two or more lighter atomic nuclei are forced together and are fused into a heavier nucleus. In the case of the formation of hydrogen into helium, our sun does that in what is called the proton-proton reaction.
How many neutrons are produced during a typical uranium fission reaction and what is the role of these neutrons in a nuclear 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.
