Measurement of L Shell X-Ray Production and Average L Shell Fluorescence Yields for Some Heavy Elements at 123.6 keV

G. Apaydin, V. Ayli kçi, N. Kaya, E. Cengiz and E. Tiraşoğlu Department of Physics, Faculty of Arts and Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey

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Received: 4 03 2008; in final form: 9 04 2008;

The L3l, L3α, L3β, L2β, L2γ, L2η, L1β and L1γ X-ray production cross-sections and L shell average fluorescence yields were measured for the elements from Re to U using excitation energy of 123.6 keV. Measurements were performed using an 57Co annular radioactive source and a Si(Li) detector. The theoretical values of the cross-sections were calculated using theoretically tabulated values of subshell photoionization cross-sections;the Coster-Kronig transition probabilities were based on the Dirac-Hartree-Slater theory and radiative emission rates. Experimental results were compared with the theoretically calculated values of L shell X-ray cross-sections. The present experimental results are in agreement with theoretical values.

DOI: 10.12693/APhysPolA.113.1629 PACS numbers: 32.30.Rj, 32.50.+d, 32.80.Fb