Fundamentals in Nuclear Physics (2014/5/15) Small Test Kenichi Ishikawa E-mail: [email protected] URL: http://ishiken.free.fr/english/lecture.html Student ID:

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Suppose that neutrons are absorbed by material M through two types of reactions A and B with macroscopic cross sections ΣA and ΣB , respectively. Consider that N neutrons are now (perpendicularly) incident to a plate made of material M with a thickness of z. 1. How many neutrons (in average) exit this plate without being absorbed?

2. How many neutrons (in average) are absorbed through reaction B?

1