- #1
Jack_O
- 65
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Does the absorption cross section to scattering cross section ratio of an isotope vary with neutron energy or stay constant?
I have heard that cross sections in general are inversely proportional to velocity (eg the fission cross section of U235 is about 1000 times higher for thermal neutrons than fast neutrons) which would suggest the answer is yes. But I have not found an explicit answer.
I have heard that cross sections in general are inversely proportional to velocity (eg the fission cross section of U235 is about 1000 times higher for thermal neutrons than fast neutrons) which would suggest the answer is yes. But I have not found an explicit answer.