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Fluorescent emission spectra of lithium fluoride with use of synchrotron radiation

1987; American Physical Society; Volume: 35; Issue: 16 Linguagem: Inglês

10.1103/physrevb.35.8374

1095-3795

K. L. Tsang, C. H. Zhang, T. A. Callcott, E. T. Arakawa, D. L. Ederer,

Atomic and Molecular Physics

The soft x-ray emission spectra of single-crystal LiF excited with synchrotron radiation are presented. The radiative decay of the lithium 1s core exciton is observed. Radiative transitions between the valence band and the core hole are also observed in undamaged samples. Spectra obtained with broadband synchrotron-light excitation are shown to be dominated by diffuse scattering from damaged sample surfaces. Excitation with photon energies between 100 and 150 eV generates true emission spectra. An important result is that electrons excited into the conduction band are frequently trapped in an exciton state before recombining with the core hole.