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High, room and low temperature photoabsorption cross sections of CS 2 in the 1800–2300 Å region
Author(s) -
Chen F. Z.,
Robert Wu C. Y.
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl01898
Subject(s) - absorption cross section , comet , synchrotron radiation , wavelength , physics , atomic physics , radiation , synchrotron , photometry (optics) , cross section (physics) , astrophysics , materials science , optics , astronomy , stars
Using synchrotron radiation as a continuum light source, we have measured the absolute photoabsorption cross sections of CS 2 with a spectral bandwidth (FWHM) of 0.8 Å. The absorption cross sections of CS 2 have been measured from 1800 to 2300 Å at temperatures of 383 and 295 K and from 1800 to 2150 Å at 203 K. Significant temperature effects and hot bands are observed, particularly in the long wavelength region. The apparent continuum cross section underlying the vibrational features in the 2200–2300 Å region increases by about an order of magnitude when the gaseous CS 2 temperature increases from 295 K to 383 K. The new temperature‐dependent laboratory cross section data should be useful in the determination of the CS 2 abundance in Jupiter's atmosphere after the impact of Comet Shoemaker‐Levy 9.