Self-, air-, and helium broadening in the [nu][sub 2] band of H[sub 2]S
Journal Article
·
· Journal of Molecular Spectroscopy; (United States)
- Technischen Univ. Berlin (Germany). Optisches Institut
Until very recently, the H[sub 2]S molecule was minor atmospheric pollutant produced mainly by natural sources and the processing of oil and coal containing sulfur. During recent years, however, a new H[sub 2]S source appeared with the introduction of car catalysts which reduce sulfur. Short-term concentrations up to the ppm range are produced under certain conditions, but these amounts are more of an olfactory problem than a health hazard. Nevertheless, these emissions have increased the interest in spectroscopic studies on H[sub 2]S in view of the possible use of infrared methods for concentrations methods for concentration measurements. Here, the broadening of H[sub 2]S transitions in the [nu][sub 2] band was measured with H[sub 2]S, air, and helium as perturbers using a pulsed tunable diode laser spectrometer. Up to 20 lines (for self-broadening) with J[double prime] [le] 8 and K[double prime][sub a] [le] 5 have been studied at room temperature. The self- and air-broadening coefficients show a weak decrease with increasing J[double prime] (0.121 cm[sup [minus]1]/atm [le] [gamma][sub self] [le] 0.186 cm[sup [minus]1]/atm and 0.072 cm[sup [minus]1]/atm [le] [gamma][sub air] [le] 0.116 cm[sup [minus]1]/atm, respectively). Helium broadening was measured for the first time, showing a strong J[double prime] dependence of [gamma] (0.042 cm[sup [minus]1]/atm [le] [gamma][sub He] [le] 0.099 cm[sup [minus]1]/atm).
- OSTI ID:
- 7113439
- Journal Information:
- Journal of Molecular Spectroscopy; (United States), Journal Name: Journal of Molecular Spectroscopy; (United States) Vol. 165:1; ISSN JMOSA3; ISSN 0022-2852
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
AIR POLLUTION MONITORING
CHALCOGENIDES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
LASER SPECTROSCOPY
LINE BROADENING
MONITORING
POLLUTION
SPECTRA
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
AIR POLLUTION MONITORING
CHALCOGENIDES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
LASER SPECTROSCOPY
LINE BROADENING
MONITORING
POLLUTION
SPECTRA
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS