Determination of Atomic Number Exponent for Elemental Absorber at Am– 241 Energy in X–Ray Attenuation Experiments | ||
| Journal of Al-Nahrain University - Science | ||
| Article 1, Volume 15, Issue 3, September 2012, Pages 95-100 | ||
| Authors | ||
| Laith Ahmed Najim; Sabeeh Karyakos Shamoon; Shiama Talal Atalah | ||
| Abstract | ||
| In X-ray absorption experiment, the dependence of the photoelectric absorption cross-section varied with atomic number Z. In this paper, the dependence on Z of the cross – section or coefficient of photoelectric absorption is first evaluated from published data for (20) elements ranging from Al–Sn, and then the cross–section for Fe is obtained experimentally by measuring the X-ray intensity with and without the Fe absorber and compared with the theoretical value, the variation of the photoelectric absorption coefficient (µ/ρm) showed less dependence on Z for the two tested of Z regions. This is because of the inclusion of mass density (ρm) of the absorber in the coefficient. The values of m obtained in the present work increases linearly with energy for both ranges of elements | ||
| Keywords | ||
| Photoelectric effect; Cross section; Mass absorption coefficient; Arial density | ||
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