Abstract
The structure and relative intensity of x-ray fluorescence Mα and Mβ spectra of Bi atoms have been studied experimentally under excitation by Cr and Cu Kα1,2 radiation. It has been found that observed short-wavelength satellites are mostly caused by the radiative transitions M 5 N-N 6,7 N (M 5 N satellites) and M 4 N-N 6 N (M 4 N satellites), whereas the transitions M 5 O-N 6,7 O and M 4 O-N 6 O are overlapped with the profiles of x-ray diagram Mα1,2 and Mβ lines and are not observed as individual structures. The M 5 N and M 4 N satellites have been separated from total spectral profiles, and the relative intensities of such groups of lines have been determined. A model has been proposed for calculation of emission cross sections of the M 4 N and M 4 N satellites, as well as the Mα1,2 lines along with the M 5 O satellites and the Mβ line with the M 4 O satellites. The model takes into account main channels of generation and migration of vacancies in M subshells connected with the Coster-Kronig transitions M i -M j N and M i -M j O, radiative transitions M i -M j and M i -N j , and shaking processes upon production of the M i vacancy, as well as with cascades of such processes. Comparison of experimental values of the relative intensity of the separated satellites with calculated results indicates the correctness of the model used.
Published Version
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