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Title: Submillimeter Spectra of Low Temperature Gases and Mixtures

Submillimeter absorption spectra of nitrogen, nitrogen-argon mixtures, and methane have been measured using temperatures and pressures near to those found in the atmospheres of Titan and Saturn. The experiments show the spectral signature of dimers which will likely appear in far-infrared spectra of Titan that will be obtained by the Composite Infrared Spectrometer (CIRS) onboard the Cassini spacecraft. The recent CIRS spectrum of Jupiter shows far-infrared spectral lines of methane and the corresponding lines are observed in the laboratory. We are extending this work to lower frequencies using a new differential Michelson interferometer that operates over the frequency region 3-30 cm{sup -1}.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
15002530
Report Number(s):
UCRL-JC-150959
TRN: US200416%%94
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: NASA Laboratory Astrophysics Workshop, Moffett Fields, CA (US), 05/01/2002--05/03/2002; Other Information: PBD: 19 Sep 2002
Research Org:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION SPECTRA; ASTROPHYSICS; DIMERS; GASES; INFRARED SPECTROMETERS; METHANE; MICHELSON INTERFEROMETER; MIXTURES; NASA; NITROGEN; SPECTRA