| Popis: |
A fast an accurate interpolation method for determining gamma-ray attenuation coefficients has been developed. Based on a simple program that can be stored in a hand calculator, the method fits the attenuation coefficients as a function of gamma-ray energy. For materials whose atomic number is in the low to medium range, a single 8- or 9-term polynomial suffices over an energy range of 40 keV to 15 MeV. For materials of high atomic number, discontinuities in the attenuation coefficients at the K- and L-absorption edges require the use of more than one polynomial. |
