Vibrational overtone absorption in solid hydrogen

Details Vibrational overtone absorption in solid hydrogen Vibrational overtone absorption in solid hydrogen

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981phrvl..47.1631p&link_type=abstract

Physical Review Letters, vol. 47, Nov. 30, 1981, p. 1631-1635.

Astronomy and Astrophysics

Astronomy

16

Hydrogen, Molecular Absorption, Molecular Excitation, Molecular Spectra, Solidified Gases, Vibrational Spectra, Absorption Spectra, Astronomical Spectroscopy, Harmonic Excitation, Infrared Spectra, Laser Spectroscopy, Piezoelectric Transducers, Pulsed Lasers, Raman Spectra, Yag Lasers, Solid Helium And Related Quantum Crystals, Piezo-, Elasto-, And Acoustooptical Effects, Photoacoustic Effects

Scientific paper

Results of studies of the second and third harmonics of solid H2 in the 8000 and 12,000 kayser regions are reported. Transition frequencies for the second overtone vibrational absorption band in the solid were found to be lower than calculated free-molecule values, a difference qualitatively understandable in the context of solid-state interactions. Pulsed laser piezoelectric transducer optical spectroscopy was used to examine the absorption spectra of the condensed phase H2 at temperatures less than 14 K. An Yd:YAG laser provided fundamental radiation in the 550-750 nm region; first and second order stimulated Raman scattering in a high pressure H2 cell allowed shifting of the fundamental radiation down to the 700 nm to 1.6 micron range. A necessity is noted for studies of third and fourth overtones of solid H2 at 15,600 and 19,000 kayser, regions significant in the understanding of ground-based planetary optical astronomy spectra of celestial bodies such as Uranus and Neptune.

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