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What is cross-section?
Asked by akhileshsingh.future | 19 Apr, 2018, 08:21: PM
answered-by-expert Expert Answer
Probability of reactions involved with nucleus such as collision, fission, fusion etc. are expressed
in terms of a parameter known as cross-section of particular nuclear reactions.
 
Probability p of nuclear reaction proportional to number density n ( per cubic metre).
Probability p of nuclear reaction also proportional to interaction length l ( m)
 
hence p = σ × n × l , where σ is the constant of proportionality and is expressed as cross-section of particular nuclear reaction
because of its dimension ( square metre )
Answered by Thiyagarajan K | 20 Apr, 2018, 10:47: AM

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