Nuclear physics! #7

Media is light water with density 0.8 g/cm3 (microscopic cross section of absorption of hydrogen equals 0.33 b , microscopic cross section of oxygen is about zero). Neutron velocity equals 2200 m/s . Calculate mean free path (λa) and mean lifetime (τa) in the media.

Mean free path equals … choose correct answer

5 cm 0.5 cm 500 cm 50 cm

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