Theoretical references used

  • http://www-cxro.lbl.gov/optical_constants/ 
    B.L. Henke, E.M. Gullikson, and J.C. Davis, X-ray interactions: photoabsorption, scattering, transmission, and reflection at E=50-30000 eV, Z=1-92, Atomic Data and Nuclear Data Tables Vol.54 (no.2), 181-342 (July 1993)
  • http://physics.nist.gov/PhysRefData/Xcom/Text/XCOM.html 
    J.H. Hubbell, Photon Cross Sections, Attenuation Coefficients and Energy Absorption Coefficients from 10 keV to 100 GeV, Natl. Stand. Ref. Data Ser. 29 (1969). J.H. Hubbell, Photon Mass Attenuation and Mass Energy-Absorption Coefficients for H,C,N,O,Ar and Seven Mixtures from 0.1 keV to 20 MeV, Radiat. Res. 70, 58-81 (1977).