@article{78f7d6e839204ca1abfbd055ae396407,
title = "Probing the valence character of O 1s→Rydberg excited O2 by participator Auger decay measurements and partial ion yield spectroscopy following x-ray absorption",
abstract = "The valence character of O 1s→Rydberg excited O2 is investigated by means of participator Auger decay spectroscopy, performed at selected photon energies across the K -shell resonance region, and by means of partial ion yield x-ray absorption spectroscopy. For several of the excitation energies studied, the authors find substantial * (u-4, u-2) valence character being mixed with ns and np (u-4, u-2) Rydberg states. An experimental indication of a coupling between the channels associated with quartet and doublet ion cores is considered and discussed. New spectroscopic constants are derived for the singly ionized X Πg2 state of O2 based on the observation of at least 20 vibrational sublevels.",
author = "R. Feifel and T. Tanaka and M. Kitajima and H. Tanaka and {De Fanis}, A. and R. Sankari and L. Karlsson and S. Sorensen and Piancastelli, {M. N.} and G. Pr{\"u}mper and U. Hergenhahn and K. Ueda",
note = "Funding Information: The experiment was carried out with the approval of the SPring-8 program review committee. This study was supported by Grants-in-Aid for Scientific Research from the Japanese Society for the Promotion of Science (JSPS). The authors acknowledge the staff of SPring-8 for their assistance during the course of the experiment and V. Carravetta for discussion. One of the authors (R.F.) acknowledges the Swedish Research Council (VR) and Tohoku University for hospitality and financial support during his stay there. Another author (S.S.) also acknowledges VR and the Swedish Foundation for Strategic Research (SSF) for support.",
year = "2007",
doi = "10.1063/1.2723745",
language = "English",
volume = "126",
journal = "Journal of Chemical Physics",
issn = "0021-9606",
publisher = "American Institute of Physics Publising LLC",
number = "17",
}