Nuclear Science and Engineering / Volume 55 / Number 1 / September 1974 / Pages 85-88
Technical Paper / dx.doi.org/10.13182/NSE74-A23969
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The lifetime distribution for initially monoenergetic photons subject to relativ-istic Compton (Klein-Nishina) scattering is evaluated using an analog of neutron slowing-down theory. By using reasonable approximations to the energy dependence of photon cross sections, this distribution and the lifetime-averaged cross sections are evaluated in closed form. The averaged cross sections are useful when all once-or-more scattered photons from a given source energy must be treated as a single group.