Barium L subshell Coster-Kronig and fluorescence yields by yhe subshell selective photoionization method'

R.A. BARREA; C. A. PÉREZ; H. J. SÁNCHEZ

NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH B - BEAM INTERACTIONS WITH MATERIALS AND ATOMS

Año: 2004 vol. 215 p. 308 - 315

0168-583X

The method of selective photoionization of individual subshells by monochromatized synchrotron radiation hasbeen employed to measure independently all Coster–Kronig and fluorescence yields of the Ba L subshells. The energy ofthe primary radiation was set at about 50 energy points in the range of the L edges. At each setting, the induced Lfluorescence radiation was recorded by a Si(Li) detector. A pure Ti foil was used for normalization purposes and the TiK fluorescence lines were also recorded under the same geometrical conditions as the Ba sample. Fitting the measuredfluorescence intensities versus primary energy with the photoelectric cross-sections derived the Coster–Kronig coefficientsand fluorescence yields. The obtained yields were compared with tabulated data.
2003 Elsevier B.V. All rights reserved.