Observation of the high resolution infrared absorption spectrum of CO2 molecules isolated in solid parahydrogen

Low-Temperature Physics and Chemistry in Cryomatrice

Автор(и)

  • Simon Tam Propulsion Directorate, U.S. Air Force Research Laboratory AFRL/PRSP, Bldg. 8451, Edwards AFB, CA 93524√7680
  • Mario E. Fajardo Propulsion Directorate, U.S. Air Force Research Laboratory AFRL/PRSP, Bldg. 8451, Edwards AFB, CA 93524√7680

DOI:

https://doi.org/10.1063/1.1312391

Ключові слова:

PACS: 07.20.Mc, 61.72.Ww, 67.80.-s, 78.30.-j, 81.10.Bk, 81.30.Kf

Анотація

We report the observation of high resolution (0.008 cm-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-1 full-width-at-half-maximum) absorption features appear in the 2343.5 to 2345 cm-1 region. We assign the three strongest peaks to the n3 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.

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Опубліковано

2000-09-10

Як цитувати

(1)
Tam, S.; Fajardo, M. E. Observation of the High Resolution Infrared Absorption Spectrum of CO2 Molecules Isolated in Solid Parahydrogen: Low-Temperature Physics and Chemistry in Cryomatrice. Fiz. Nizk. Temp. 2000, 26, 889-898.

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