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High resolution absorption cross-section measurements of the Schumann–Runge bands of O2 by VUV Fourier transform spectroscopy

✍ Scribed by T. Matsui; A.S.-C. Cheung; K.W.-S. Leung; K. Yoshino; W.H. Parkinson; A.P. Thorne; J.E. Murray; K. Ito; T. Imajo

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 209 KB
Volume: 219
Category: Article
ISSN: 0022-2852
DOI: 10.1016/s0022-2852(03)00009-2

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✦ Synopsis

The photoabsorption spectrum of the O 2 Schumann-Runge bands was measured with resolution comparable to the Doppler widths by using the VUV Fourier transform spectrometer from Imperial College, London, combined with synchrotron radiation as a continuum light source at the Photon Factory, KEK, Japan. The analysis of the (12,0)-(17,0) bands of the Schumann-Runge system provides accurate rotational line positions as well as the line intensities from 185 to 175 nm. Molecular constants of the v 0 ¼ 12 to 17 levels of the B 3 R À u state have been determined. The (v 0 ; 0) band oscillator strengths were determined as 2.38, 2.62, 2.70, 2.66, 2.40, and 2:12 Â 10 À5 for the bands from v 0 ¼ 12 to 17, respectively.

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