Klein-Nishina (Compton effect) cross section pee electron and corresponding ener
ID: 1456366 • Letter: K
Question
Klein-Nishina (Compton effect) cross section pee electron and corresponding energy-transfer cross section per electron () as a function of primary photon quantum energy Av. (After Nelms, 1953.) where N_A = 6.022 times 10^25 mole^-1 is Avogadro's constant, the number of atoms in a gram-atomic weight of any element or the number of molecules in a gram-molecular weight of any compound, Z number of electrons per atom of an element or per molecule of a compound, A = number of grams per mole of material (i.e., A is the gram-atomic or molecular-weight), Reviewing Eqs. 7.16-7.18 we see that where the last, approximate proportionality requires some explanation: With the exception of hydrogen, for which ZIA = I. Z/A ranges between 0.5 and 0.4, tending to decrease gradually with increasing Z (see Appendix B). The somewhat crude assumption of constant ZJA means that the Compton mass attenuation coefficient is approximately Z - independent, like the electronic cross section. The atomic cross section (7.17) is proportional to This latter pattern applies toExplanation / Answer
Your question is unclear.
The expression you give is the scattering cross section of particles or formula Klein-Nishina formula
This expression as you can see in the chart to the ability of interaction of radiation and matter depends on several factors, but in general to Section out effective small the interacting is weak and matter is transparent to this radiation, however if the cross section is large interaction is strong and the radiation is absorbed.
Its use is in the charts as your samples to locate the best cross section for a given process occurs
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