Abstract
We have measured the absolute photoionization cross sections of to ions in the photon energy range covering the first ionization threshold up to 160 eV. Particular interest is emphasized on the region of the excitations. The experimental data are compared to the results of calculations we have performed using a spectral opacity code, as well as to available -matrix and one-electron calculations. It is shown that often the theoretical results tend to overestimate the intensity of the photoexcitations. An anomalously low value of the integrated oscillator strength is measured for ion.
- Received 19 December 2008
DOI:https://doi.org/10.1103/PhysRevA.79.033415
©2009 American Physical Society