The latest data of fluorescence and Coster-Kronig yields in use in EGS5 was adopted from The Table of Isotopes eighth edition. Since the fluorescence and Coster-Kronig yields from the Table of Isotopes were taken from several previous sources, it became reasonable to inspect these yields with a more updated database. In this work, we report the results of the fluorescence yields comparisons performed between the data from The Table of Isotopes and EADL the data from the Livermore Evaluated Atomic Data Library. The EADL data, in general, showed several percents difference in comparison with the previously used data and in some points the difference was tremendous. The updated database in EGS5 was tested and compared to previous simulation results for K-X-rays emission spectra of copper titanium and iron targets. The total counts of each fluorescence emission was calculated using EGS5 and was compared with experimental measurements results for polarized photon beams with incident energies of 20, 30 and 40 keV. The use of EADL database for atomic fluorescence K X-rays emission in the simulations, improved the matching between measured-to-calculated counts ratios. The EADL L subshell fluorescence emissions led to some discrepancies, and therefore alternative L subshell and Coster-Kronig yields were examined to be used in the EGS5 Monte Carlo simulation code system. Campbell summarized the differences in the L shell fluorescence yields and Coster- Kronig yields from several databases and provided recommended values. The use of the Campbells' yields values in the EGS5 simulations resulted improved measured-tocalculated counts ratios for the L fluorescence emission in gadolinium, tungsten and lead targets.
|Number of pages||10|
|State||Published - 1 Dec 2007|
|Event||14th EGS Users' Meeting in Japan 2007 - Tsukuba, Japan|
Duration: 7 Aug 2007 → 9 Aug 2007
|Conference||14th EGS Users' Meeting in Japan 2007|
|Period||7/08/07 → 9/08/07|
ASJC Scopus subject areas