Precise measurement of the KLL and KLX Auger spectra of cadmium from the EC-decay of In-111

The KLL and KLX Auger spectra of Cd from the EC-decay of In-111 have been a nalyzed with the 7 eV instrumental resolution using a combined electrostati c spectrometer and a source prepared by a modified Langmuir-Blodgett method . Energies and relative intensities of all the nine well resolved KLL lines have been precisely determined. While the latter quantities were found to be in very good agreement with the relativistic intermediate coupling calcu lations, the former ones deviate from results of the widely used semi-empir ical calculations especially in the case of the absolute energies. The pred icted strong influence of the relativistic effects on the KL1L2(P-3(0)) tra nsition intensity has been proved. Most of the main KLX Auger lines have be en well separated and their complex structures have been observed. Accurate energies and intensities obtained for these lines have been compared with results of calculations. The intermediate coupling splitting of the KL2L2 a nd KL3L3 lines have been revealed. The KLX/KLL, KLN(O)/KLM, and KXY/KLL gro up intensity ratios have also been determined. A conclusion is made that fu rther finer theoretical investigation on the complex interaction mechanism for two inner-shell vacancies is still very much needed. (C) 1999 Elsevier Science B.V. All rights reserved.