期刊
MOLECULAR PHYSICS
卷 119, 期 1-2, 页码 -出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00268976.2020.1741714
关键词
Spectroscopy; Rydberg states; oxygen; metastable states; vacuum ultraviolet
资金
- Agence Nationale de la Recherche [ANR-11-IDEX-0004-02]
Updated analyses of singlet Rydberg states of O-2 were conducted using high-quality FT-VUV spectra and ab initio calculations, providing quantitative cross-sections for Rydberg - transitions.
Updated analyses of several singlet Rydberg states of O-2 via spectra involving excitation from the metastable a(1)Delta(g) and states are presented. The high-quality FT-VUV spectra available from the DESIRS beamline at the SOLEIL synchrotron gives significantly improved spectra compared to previous work. The Rydberg states analysed include v = 0-4, 3p sigma(1)pi(u) v = 0-2, 3p pi(1)Delta(u) v = 0-2, v = 0-1, 4p sigma(1)pi(u) v = 0 and 4p pi(1)Delta(u) v = 0. This is complemented by high-quality ab initio calculations on the and (1)Delta(u) Rydberg states to determine the transition moments providing the first quantitative cross-sections for Rydberg - transitions. These are validated against the experimental data. The results suggest the most promising candidate for determining number density is likely to be the 1-0 band of the transition at 131.3 nm. [GRAPHICS] .
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