Age Approximation to X‐Ray Transport

摘要

The well‐known age approximation of neutron transport theory has been applied to the photon transport problem. By treating photoelectric absorption analogously to resonance absorption in the neutron problem and using a first collision source term, calculations done for air compare favorably with Monte Carlo calculations for photon energies up to 100 keV, and to values of density times distance of about 30 g/cm2.