Mass Energy-Transfer and Mass Energy-Absorption Coefficients, Including In-FlightPositron Annihilation for Photon Energies 1 keV to 100 MeV

摘要

Mass energy-transfer (Mu(sub u)/Rho) and mass energy-absorption coefficients(Mu(sub en)/Rho) are tabulated in units of (sqcm/g) for photon energies between 1 keV and 100 MeV for 29 elements (Z = 1-92), and 14 mixtures and compounds of general dosimetric interest. Cross sections for photo-effect, incoherent scattering, pair and triplet production are those compiled or generated by the National Institute of Standards and Technology (NIST) (formerly the National Bureau of Standards). Corrections are included for in-flight positron annihilation, previously not applied in NIST calculations for energies above 10 MeV.