2014/12/31 by Mathias Barthel, Roman Flesch, R. Flesch +4 · 1 citation
Chemistry · Engineering · Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic and Molecular Physics #Atomic physics #Chemistry #Ground state #Ion #Ionization #Laser-induced spectroscopy and plasma #Metastability #Optics #Photoionization #Photon #Photon energy #Physics #Resonance (particle physics) #Rydberg formula #Spectral line #astro-ph.EP #physics.atom-ph #physics.chem-ph
paper · pdf · doi:10.1103/physreva.91.013406
Accepted for publication in Physical Review A, 20 pages, 8 figures, 3 tables
arxiv created 2015/01/14 · openalex publication_date 2015/01/20 · arxiv updated 2015/06/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
Photoionization of neutral atomic sulfur in the ground and metastable states was studied experimentally at a photon energy resolution of 44 meV (full width at half maximum). Relative cross section measurements were recorded by using tunable vacuum ultraviolet radiation in the energy range 9--30 eV obtained from a laser-produced plasma and the atomic species were generated by photolysis of molecular precursors. Photoionization of this atom is characterized by multiple Rydberg series of autoionizing resonances superimposed on a direct photoionization continuum. A wealth of resonance features observed in the experimental spectra are spectroscopically assigned and their energies and quantum defects tabulated. The cross section measurements are compared with state-of-the-art theoretical cross section calculations obtained from the Dirac Coulomb R-matrix method. Resonance series in the spectra are identified and compared, indicating similar features in both the theoretical and experimental spectra.