The nuclear cross section of a nucleus is a concept used to describe the probability that a nuclear reaction will occur. It can be quantified physically as "characteristic area", denoted as σ {\displaystyle \sigma } , where a larger σ {\displaystyle \sigma } means a larger probability of interaction.
The nuclear cross section of a nucleus is a concept used to describe the probability that a nuclear reaction will occur. It can be quantified physically as "characteristic area", denoted as σ {\displaystyle \sigma } , where a larger σ {\displaystyle \sigma } means a larger probability of interaction.
Source: Wikipedia "Nuclear cross section" · CC BY-SA 4.0
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