Answer to Question #121471 in Atomic and Nuclear Physics for Dheeraj

Question

interaction cross section of the neutrons ith the nucleus, if the mean free path of the neutrons in the nuclear matter is about 10000m is?

Answer 1

The mean-free-path length is

$$\lambda=\frac{1}{\Sigma_t}\rightarrow\Sigma_t=\frac{1}{\lambda}=1/10000=1\cdot10^{-4}\text{ m}^{-1}.$$