Absorption cross sections for HF laser lines due to traces of CO/sub 2/, N/sub 2/O, and CH/sub 4/ in air (in Russian)
The emission from an HF (DF) laser is spread over a large number of vibrational-rotational lines in the range 2.7-4.2 ..mu..m, which contains absorption bands of virtually all substances of interesting quantitative gas analysis, and in particular, detecting atmospheric pollutants, determining discharges from industrial plants, locating deposits of certain minerals, forecasting volcanic activity, and so on. Pulsed chemical HF (DF) lasers can be based on the chain reaction of fluorine with hydrogen (deuterium), which is promising for these purposes because the number of lines is large by comparison with any other type of laser (about 100 lines). These lasers also have high efficiency in converting the pumping energy to radiation and high beam power with relatively small dimensions and the same laser cell can be used to obtain the emission from carbon dioxide in the range 9.6-10.6 ..mu..m by energy transfer from DF to carbon dioxide. It is necessary to know the absorption characteristics of the substances at the lines of the HF (DF) laser. In this paper, the authors report measured cross sections for carbon dioxide, nitrogen oxide, and carbon hydrogenate, in the form of minor impurities in the air (about 1-10%) for various lines from an HF laser. The authors compare the data with published values, while the available spectroscopic characteristics are used in theoretical calculations of the absorption cross section and compared with the experiment.
- OSTI ID:
- 6129936
- Journal Information:
- J. Appl. Spectrosc. (Engl. Transl.); (United States), Vol. 44:6; Other Information: Translated from Zh. Prikl. Spektrosk.; 44: No. 6, 953-957(Jun 1986)
- Country of Publication:
- United States
- Language:
- Russian
Similar Records
Optical saturation characteristics of CH/sub 3/OCH/sub 3/ and CCl/sub 3/F
High power laser coupling. Final report. [HF laser weapons]
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
CARBON MONOXIDE
ABSORPTION SPECTRA
AIR POLLUTION MONITORING
LASER SPECTROSCOPY
LASER RADIATION
ABSORPTION
LINE WIDTHS
METHANE
NITROUS OXIDE
CHEMICAL LASERS
CROSS SECTIONS
DEUTERIUM COMPOUNDS
EXCITATION
GAS ANALYSIS
GROUND STATES
HYDROFLUORIC ACID
OSCILLATOR STRENGTHS
POLLUTANTS
QUANTUM MECHANICS
QUANTUM NUMBERS
ROTATIONAL STATES
VIBRATIONAL STATES
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDROCARBONS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LASERS
MECHANICS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SPECTRA
SPECTROSCOPY
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
400102 - Chemical & Spectral Procedures
640302 - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory