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Electron-excited 3d hole states of La3+ in solids

Physical Review B, ISSN: 0163-1829, Vol: 30, Issue: 8, Page: 4399-4411
1984
  • 34
    Citations
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  • 1
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Metrics Details

  • Citations
    34
    • Citation Indexes
      34
  • Captures
    1

Article Description

The La3+ excited states with a 3d inner hole are investigated by x-ray absorption spectroscopy (XAS), electron-stimulated x-ray emission spectroscopy (EXES), and characteristic isochromat spectroscopy (CIS). The relative energies of these various states are determined and their decay processes are considered. It is shown that the levels associated with the La3+ 3d94f1 configuration are well described in jj coupling. It is shown that the 3d94f1 configuration states decay by direct recombination of the excited electron and the inner hole and simultaneously by transitions taking place in the presence of the extra 4f electron. The emissions already observed by Liefeld et al. close to the 3d32 and 3d52 thresholds are studied and interpreted as f-d discrete emissions from J levels of the 3d94f2 configuration. A nonradiative transition from J levels of this same configuration is also evidenced by CIS at the 3d32 threshold; it is identified as a 3d32-14f23d52-14f1 Coster-Kronig-type process. The various nonradiative processes transferring a 3d32 hole to a 3d52 hole are considered and their relative intensity discussed. From all of the results it is concluded that final-state-type coupling effects are weak in the radiative decay of 3d-1 excited states in La3+. © 1984 The American Physical Society.

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