Determination of spectroscopic properties of atmospheric molecules from high resolution vacuum ultraviolet cross section and wavelength measurements. Semiannual status report No. 8, 1 May-31 October 1988
Progress is given on work on: cross section measurements in the transmission window regions of the Schumann-Runge bands of oxygen; the determinations of predissociation linewidths; the theoretical calculation of band oscillator strengths of the Schumann-Runge absorption bands of O-16O-18; the determination of molecular spectroscopic constants; and the combined Herzberg continuum cross sections. The experimental investigations relevant to the cross section measurements, predissociation linewidths, and molecular spectroscopic constants are effected at high resolution with a 6.65 m scanning spectrometer which is, by virtue of its small instrumental width (FWHM = 0.0013 nm), suitable for cross section measurements of molecular bands with discrete rotational structure. Such measurements are needed for accurate calculations of the stratospheric production of atomic oxygen and heavy ozone formed following the photo-predissociation of O-16O-18 by solar radiation penetrating between the absorption lines of O-16(sub 2).
- Research Organization:
- Smithsonian Astrophysical Observatory, Cambridge, MA (USA)
- OSTI ID:
- 6353328
- Report Number(s):
- N-89-13851; NASA-CR-184601; NAS-1.26:184601
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHEMICAL REACTIONS
CROSS SECTIONS
DECOMPOSITION
DISSOCIATION
DOCUMENT TYPES
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
ELEMENTS
EVEN-EVEN NUCLEI
ISOTOPES
LIGHT NUCLEI
NONMETALS
NUCLEI
OXYGEN
OXYGEN 16
OXYGEN 18
OXYGEN ISOTOPES
OZONE
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PROGRESS REPORT
RADIATIONS
SPECTRA
STABLE ISOTOPES
STRATOSPHERE
ULTRAVIOLET RADIATION
ULTRAVIOLET SPECTRA