Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10716195 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2005 | 14 Pages |
Abstract
 We determined sub-shell photoabsorption cross-sections between 5 and 14.5 keV for the 6s, 5d, 5p, 4f and 5s levels of Au by using the well-established cross-sections of C 1 s as the reference. Spectra were recorded with a commercially available hemispherical analyzer, which we equipped with a pre-retarding lens, allowing us to detect electrons with energies up to 14.5 keV. A comparison with existing relativistic central-field Hartree-Slater calculations reveals that most measured cross-sections are at least twice as large as the theoretical values. In particular, the 6 s derived conduction band electrons have a cross-section almost one order of magnitude larger than given by the (atomic) calculations, which suggests that this may be a solid state effect. These findings are beyond the error of our measurements, which is mostly determined by a lack of precise data for electron escape depths and exact values for the angular anisotropy of electron emission.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
C. Kunz, S. Thiess, B. Cowie, T.-L. Lee, J. Zegenhagen,