Abstract
The photoabsorption process in atomic uranium has been investigated experimentally and theoretically in the 15–150-eV region. Using the dual laser plasma technique, the photoabsorption spectrum has been recorded while for the first time the region has been remeasured photoelectrically using both photoabsorption and photoion spectroscopy. Interpretation of the photoabsorption spectra is supported by Hartree-Fock calculations which take into account spin-flip decay and the interaction of many discrete states with many continua. The spectrum is entirely dominated by spin-orbit split transitions. The -subshell photoabsorption is shown to consist predominantly of discrete excitations; here the electrostatic and spin-orbit interactions are comparable in strength.
- Received 18 January 2000
DOI:https://doi.org/10.1103/PhysRevA.61.062706
©2000 American Physical Society