Laboratory Measurements and Modeling of Molecular Photoabsorption Cross Sections in the Ultraviolet for Planetary Atmospheres Applications

Details Laboratory Measurements and Modeling of Molecular Photoabsorption Cross Sections in the Ultraviolet for Planetary Atmospheres Applications Laboratory Measurements and Modeling of Molecular Photoabsorption Cross Sections in the Ultraviolet for Planetary Atmospheres Applications

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.4906s&link_type=abstract

American Astronomical Society, DPS meeting #40, #49.06; Bulletin of the American Astronomical Society, Vol. 40, p.485

Astronomy and Astrophysics

Astronomy

Scientific paper

Our research program is dedicated to the measurement and modeling of vacuum ultraviolet and UV molecular photoabsorption cross sections with the highest practical resolution. It supports efforts to interpret and model observations of planetary atmospheres. Measurement and modeling efforts on molecular nitrogen, carbon dioxide, sulfur dioxide, and diatomic sulfur are in progress.
N2: We focus on the measurement of line f-values and line widths within the complex spectrum between 80 and 100 nm. Our measurements are incorporated into a theoretical model of the absorption spectrum of N2 which has established the mechanisms responsible for predissociation and reproduces all observed features in 14N2 and its isotopomers as a function of temperature.
CO2: The photodissociation of CO2 is a fundamental photochemical process in the atmospheres of Mars and Venus. Our research centers on the measurement of high resolution cross sections from 91 to 120 nm. We have completed measurements at 295 K and 195 K over the 106 to 120 nm region, and we are analyzing recent measurements of cross sections between 91 and 106 nm.
SO2: We provide astronomers with high-resolution cross section data for the complex ultraviolet absorption spectrum between 198 and 325 nm. Using the Imperial College VUV Fourier transform spectrometer, we have completed and published room temperature cross sections, and we are completing work on low-temperature measurements over the same spectral region.
S2: Interpretations of atmospheric (Io, Jupiter, cometary comae) S2 absorption features are hindered by a complete lack of laboratory cross section data in the ultraviolet. We are beginning an effort to quantify the photoabsorption spectrum of S2 from 200 to 300 nm based on theoretical calculations and laboratory measurements. Coupled-channel calculations will be complemented by measurements of the absorption spectrum of S2 at high resolution.

Affiliated with

Also associated with

No associations

Rating

Laboratory Measurements and Modeling of Molecular Photoabsorption Cross Sections in the Ultraviolet for Planetary Atmospheres Applications does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Laboratory Measurements and Modeling of Molecular Photoabsorption Cross Sections in the Ultraviolet for Planetary Atmospheres Applications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laboratory Measurements and Modeling of Molecular Photoabsorption Cross Sections in the Ultraviolet for Planetary Atmospheres Applications will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1439271