Journal article
Deexcitation dynamics of Rydberg states in O₂: II. Vibrational and rotational structure of 2σ⁻¹u(c⁴Σ⁻u)(ns/nd)σg³Σ⁻u (v = 0, 1) states
Publication Details
Authors: | Ehresmann, A.; Werner, L.; Klumpp, S.; Schmoranzer, H.; Demekhin, P.; Lagutin, B.; Sukhorukov, V.; Mickat, S.; Kammer, S.; Zimmermann, B.; Schartner, K. |
Publication year: | 2004 |
Journal: | Journal of Physics B: Atomic, Molecular and Optical Physics |
Pages range : | 4406-4422 |
Volume number: | 37 |
ISSN: | 0953-4075 |
Abstract
The competition between autoionization and neutral dissociation (ND) of the vibronic Rydberg states 2σ-1u(c4Σ-u)(ns/nd)σg 3Σ-u(v = 0, 1) has been investigated using an experiment of photon-induced fluorescence spectroscopy (PIFS) and the simultaneous measurement of the photo ion yield. The experiments were performed with monochromatized synchrotron radiation from BESSY II with a very narrow bandwidth of ΔE = 1.5 meV at 23 eV where it was possible to observe single rotational branches. The experiments are compared to ab initio calculations for the partial autoionization and dissociation widths and to the corresponding simulations of the spectroscopic shape of the rovibronic branches. For more precise calculations of the dissociation widths, diabatic potential curves of the 2σ-1u(c4Σ-u) states of the O2+ are extracted from the adiabatic ones and improved calculations for molecular orbitals of the Rydberg and Auger electrons are used.
The competition between autoionization and neutral dissociation (ND) of the vibronic Rydberg states 2σ-1u(c4Σ-u)(ns/nd)σg 3Σ-u(v = 0, 1) has been investigated using an experiment of photon-induced fluorescence spectroscopy (PIFS) and the simultaneous measurement of the photo ion yield. The experiments were performed with monochromatized synchrotron radiation from BESSY II with a very narrow bandwidth of ΔE = 1.5 meV at 23 eV where it was possible to observe single rotational branches. The experiments are compared to ab initio calculations for the partial autoionization and dissociation widths and to the corresponding simulations of the spectroscopic shape of the rovibronic branches. For more precise calculations of the dissociation widths, diabatic potential curves of the 2σ-1u(c4Σ-u) states of the O2+ are extracted from the adiabatic ones and improved calculations for molecular orbitals of the Rydberg and Auger electrons are used.
