# B Α-decay and nuclear reaction

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1. May 3, 2017

### Haynes Kwon

Is α-decay same as nuclear fission?
What is the difference?

2. May 3, 2017

### Staff: Mentor

Typically it is only called "fission" if the process creates two or three nuclei of similar size, but that is purely a naming convention. Cluster decays are somewhere between alpha decays and fission.

3. May 3, 2017

### Orodruin

Staff Emeritus
No, fission is not alpha decay and alpha decay is generally not considered as fission althoughit technically is a splitting of a nucleus in several parts. Generally, fission usually refers to the splitting of a nucleus in such a way that there are at least two products that carry a significant fraction of the original mass.

4. May 4, 2017

### Haynes Kwon

Thank you all. May I ask one more?
I don't see why this is not nuclear fusion.

Last edited: May 4, 2017
5. May 4, 2017

### Staff: Mentor

Same thing: Just a matter of convention what is called fusion and what is not. I guess you could call that fusion, although $(\alpha, n)$ would be a more conventional notation for the reaction.

6. May 4, 2017

### Haynes Kwon

Thank you very much.

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