Abstract
The ratio of photoemission intensities from the bulk- and surface-shifted 4f core levels of the clean Ta(100) surface was measured in two different modes: as a function of photon energy at normal emission and as a function of polar angle near the [011] azimuth at ħω=65 eV. We have also performed a multiple-scattering photoemission calculation for several first interlayer spacings ranging from the bulk value to a 15% contraction. The best agreement with experiment was obtained for a (10±5)% contraction of the first interlayer spacing.
- Received 13 April 1989
DOI:https://doi.org/10.1103/PhysRevB.40.5340
©1989 American Physical Society
