Photoionization cross sections of the aluminumlike Si+ ion in the region of the 2 p threshold (94-137 eV)
Abstract
We present measurements of the absolute photoionization cross section of the aluminumlike Si+ ion over the 94-137 eV photon energy range. The measurements were performed using the merged-beam setup on the PLEIADES beamline at the SOLEIL synchrotron radiation facility. Signals produced in the Si2 + and Si3 + photoionization channels of the 2 p subshell of the Si+ ion from both the 1 s22 s22 p63 s23 p 2P1 /2 ,3 /2 ground levels and the 1 s22 s22 p63 s 3 p24P metastable levels were observed. Absolute cross sections were determined. Calculations of the 2 p inner-shell photoionization cross sections were carried out using the multiconfiguration Dirac-Fock and Dirac-Coulomb R-matrix theoretical approaches and are compared with experiment.
- Publication:
-
Physical Review A
- Pub Date:
- December 2014
- DOI:
- 10.1103/PhysRevA.90.063409
- Bibcode:
- 2014PhRvA..90f3409K
- Keywords:
-
- 32.80.Fb;
- 32.80.Zb;
- Photoionization of atoms and ions;
- Autoionization