Study of L2,3M4,5M4,5 Auger spectra of Zn and Cu in molecular ZnCl2 and (CuCl)3 vapours |
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Authors: | S Aksela M Kellokumpu M Harkoma |
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Institution: | Department of Physics, University of Oulu, SF-90570 Oulu 57 Finland |
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Abstract: | L2,3M4,5M4,5 Auger electron spectra of Zn and Cu have been measured in molecular ZnCl2 and (CuCl) 3 vapours. The spectra have been analyzed and compared with the corresponding free-atom spectra. It is found that the main features of the spectra are atomic-like. The energies are shifted by 0.55 eV in ZnCl2 and by 3.2 eV in (CuCl)3 towards higher kinetic energy compared with the corresponding free-atom spectra. For the intensity ratios between the L3 and L2 groups, the values 2.8 and 3.7 are obtained for Zn and Cu, respectively. These intensity ratio, together with energy considerations based on free-atom Dirac—Fock calculations and observed Auger shifts, indicate that the L2L3M4,5 Coster—Kronig process is energetically possible in (CuCl)3 molecular clusters but not in ZnCl2. The satellite structure in the spectra studied also supports this conclusion. |
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