Akademik Veri Yönetim Sistemi
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, cilt.17, sa.4, ss.400-405, 2002 (SCI-Expanded)
The level widths and fluorescence yields of some atomic sub-shells were determined using L-1, L-2 and L-3 sub-shell fluorescence yields and linewidths of some L X-rays. For this measurement, the L-31, L-3alpha, L-3beta, L-2beta, L-2gamma, L-1beta, L-1gamma, L-beta, L-gamma, L-1x, L-2x and L-3x X-ray production cross sections in U and Th have been measured using the 59.5 keV incident photon energy. The measurements were performed using Am-241 radioisotopes as photon sources and a Si(Li) detector. The L X-rays are resolved with a new analytical method. The obtained L-31, L-3alpha, L-3beta, L-2beta, L-2gamma, L-1beta, L-1gamma, L-beta, L-gamma, L-1X, L-2X, and L-3X X-ray production cross sections were compared with the theoretical calculations using the most reliable theoretical values of L-i (i = 1, 2, 3) sub-shell photoionisation cross sections. fluorescence yields, X-ray emission rates and Coster-Kronig transition probabilities. The measured L-i, M-i and N-i sub-shell fluorescence yields were compared with the semi-empirical and theoretical values. Further, obtained level widths were compared with the other experimental and theoretical values. The results in the present paper are found to be in good agreement with calculated values.