Temperature-dependent collision-broadening parameters of H[sub 2]O lines in the 1. 4-[mu]m region using diode laser absorption spectroscopy

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Journal of Molecular Spectroscopy; (United States)

DOI:https://doi.org/10.1006/jmsp.1994.1234· OSTI ID:6927852

Langlois, S; Birbeck, T P; Hanson, R K ^[1]

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1. Stanford Univ., CA (United States). Dept. of Mechanical Engineering

Radiative properties of water vapor in the infrared spectrum are important in a variety of applications, including atmospheric sounding experiments, radiative sensing of combustion processes, and optical diagnostics for gasdynamic and aerodynamic studies. Here, spectrally resolved measurements of water vapor absorption spectra near 1.4 [mu]m have been performed with a tunable, distributed-feedback InGaAsP diode laser. A lineshape analysis was used to infer the collision-broadening coefficient of 11 rovibrational transitions in the [nu] + [nu][sub 3] and 2[nu][sub 1] vibration bands perturbed separately by N[sub 2], O[sub 2], CO[sub 2], and H[sub 2]. The temperature dependence of the broadening coefficients was determined using a temperature-controlled static cell and a pressure-driven shock tube over the range 300--1,200 K. The measured coefficients are in good agreement with the previous calculations of Delaye. Also, agreement is found between prior experimental data, obtained for the same rotational transitions but different vibration bands, and the results.

• OSTI ID: 6927852
• Journal Information: Journal of Molecular Spectroscopy; (United States), Vol. 167:2; ISSN 0022-2852
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
WATER VAPOR
ABSORPTION SPECTRA
CARBON DIOXIDE
COMBUSTION
EARTH ATMOSPHERE
EXPERIMENTAL DATA
HYDROGEN
INFRARED SPECTRA
LINE BROADENING
MOLECULE-MOLECULE COLLISIONS
NITROGEN
OXYGEN
REMOTE SENSING
SEMICONDUCTOR LASERS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COLLISIONS
DATA
ELEMENTS
FLUIDS
GASES
INFORMATION
LASERS
MOLECULE COLLISIONS
NONMETALS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
SEMICONDUCTOR DEVICES
SOLID STATE LASERS
SPECTRA
THERMOCHEMICAL PROCESSES
VAPORS
540110*
400800 - Combustion
Pyrolysis
& High-Temperature Chemistry