What are the differences between fissile and fissionable nuclei?

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In summary, the conversation discusses the terms "fissile" and "fissionable" in the context of fission power reactors. Fissile refers to material that can undergo fission after capturing a thermal neutron, while fissionable refers to material that can undergo fission after capturing a thermal or fast neutron. The conditions for a nucleus to be fissile or fissionable include odd A with even Z and Z greater than Z(Fe) respectively. No equations are involved in this discussion.
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TauDay
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Homework Statement



These questions refer to the terms “fissile” and “fissionable” as used in the context of current fission power reactors.

a) Describe what is meant if a nucleus is described as fissile; that is, define fissile.
Describe what is meant if a nucleus is described as fissionable; that is, define fissionable.

b) For a given nucleus, give the quantities and energy conditions that determine if the nucleus is fissile or fissionable.


Homework Equations



None.

The Attempt at a Solution



a) Fissile: Material that can undergo fission after capturing a thermal neutron. Fissionable: Material that can undergo fission after capturing a thermal or fast neutron.

b) Fissile: If A = Z + N is odd, given Z is even. And Z > Z(Fe)
Fissionable: If Z > Z(Fe)
 
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  • #2
I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
 

What is the difference between fissile and fissionable?

Fissile and fissionable are both terms used to describe materials that can undergo nuclear fission. However, there is a subtle difference between the two:

Fissile materials are those that can sustain a nuclear chain reaction. This means that when an atom of a fissile material splits, it releases enough neutrons to split other atoms, leading to a self-sustaining reaction. Examples of fissile materials include uranium-235 and plutonium-239.

Fissionable materials, on the other hand, can undergo nuclear fission but do not sustain a chain reaction. These materials require an external source of neutrons to start the fission process. Examples of fissionable materials include uranium-238 and thorium-232.

Which is more commonly used in nuclear reactors: fissile or fissionable materials?

Fissile materials are more commonly used in nuclear reactors because they can sustain a chain reaction, making them more efficient for producing energy. However, some reactors also use a mix of fissile and fissionable materials to achieve different levels of energy output.

Can fissile materials be used as fissionable materials?

Yes, fissile materials can also be used as fissionable materials. In fact, all fissile materials are also fissionable. However, not all fissionable materials are fissile.

Are fissile and fissionable materials also radioactive?

Yes, both fissile and fissionable materials are radioactive. This means they emit radiation in the form of particles and energy as they undergo nuclear reactions. This is why proper handling and disposal of these materials is crucial for safety and environmental protection.

Can fissile and fissionable materials be found in nature?

Yes, both fissile and fissionable materials can be found in nature. Uranium and thorium, which are commonly used in nuclear reactions, are naturally occurring elements. However, they are usually found in small amounts and must be processed to be used as fuel for nuclear reactions.

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