Inner-shell photoexcitations as probes of the molecular ions CH+, OH+, and SiH+: Measurements and theory
Abstract
Spectral probes for the CH+, OH+, and SiH+ hydride molecular ions that play key roles in astrophysics and plasma processes are presented. The merged-beam technique at the SOLEIL synchrotron was used to record the photoionization (ion yield) spectra of CH+, OH+, and SiH+ and that of their parent atomic ions, in the K -shell and L -shell regions, respectively. Energies and oscillator strengths for the K α (CH+ and OH+) and L α (SiH+) transitions were determined from the spectra. Ab initio calculations interpret the experimental data in terms of contributions from ground and excited valence electronic states.
- Publication:
-
Physical Review A
- Pub Date:
- June 2016
- DOI:
- 10.1103/PhysRevA.93.061401
- Bibcode:
- 2016PhRvA..93f1401M