Abstract
The Lα and Lβ X-ray emission spectra in the elements between Pd ( Z=46) and Sb ( Z=51) were measured using a high-resolution double-crystal vacuum spectrometer. The relative intensities of satellite structures, which originate in L 1 L 3 M 4,5 Coster–Kronig transitions, were estimated to that of each diagram line, and compared with calculated values. According to the work of Chen et al. [1977a. Theoretical L-shell Coster–Kronig energies 11⩽ Z⩽103. At. Data Nucl. Data Tables 19, 97–151], Salgueiro et al. [1987. J. Phys. (Paris) 48 Colloq. C9, 609] and Vlaicu et al. [1998. Investigation of the 74W L emission spectra and satellites. Phys. Rev. A 58, 3544] L 1 L 3 M 4 Coster–Kronig transition is forbidden for 50⩽ Z⩽77, and L 1 L 3 M 5 Coster–Kronig transition is forbidden for 50⩽ Z⩽73. The results suggest that L 1 L 3 M 4,5 Coster–Kronig transitions may be allowed even for Sn ( Z=50) and Sb ( Z=51).
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