Observation of the High Resolution Infrared Absorption Spectrum of CO2 Molecules Isolated in Solid Parahydrogen
Abstract
We report the observation of high resolution (0.008 cm to the -1) infrared absorption spectra of CO2 molecules isolated in solid parahydrogen (pH2) matrices at T =2.4 to 4.8 K. Several extremely sharp (0.01 to 0.04 cm to the -1 full-width-at-half-maximum) absorption features appear in the 2343.5 to 2345 cm to the -1 region. We assign the three strongest peaks to the V3 mode of isolated CO2 molecules. The spectra are consistent with trapping of the CO2 molecules in three distinct double-substitutional sites in hcp and fcc regions of the pH2 solid. We offer several hypotheses as to the origins of the numerous weaker absorption features.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 18, 2000
- Accession Number
- ADA398032
Entities
People
- M. Fajardo
- Stanley Tam
Organizations
- Air Force Research Laboratory