Photochemical generation of the optoacoustic effect. Progress report, 15 April 1981-14 April 1982

Technical Report · Thu Oct 01 04:00:00 EDT 1981

OSTI ID:5526170

Diebold, G J

Research during this reporting period has been directed toward obtaining a new mathematical solution to the Riccati equation that describes the optoacoustic effect in a photodissociated gas, and to initiating experiments to observe this effect. A solution to the nonlinear rate equation has been obtained that includes the effects of saturation of the population of the initial gas concentration. Expressions are obtained for the amplitude and phase of the optoacoustic signal that show qualitatively different behavior depending upon the value of the saturation parameter. These results point up a new direction for the experimental investigation currently underway. Experiments have been conducted to evaluate microphones and high pressure acoustic cells for phase lag measurements in a periodically photodissociated gas.

• Research Organization: Brown Univ., Providence, RI (USA). Dept. of Chemistry
• DOE Contract Number: AC02-81ER10860
• OSTI ID: 5526170
• Report Number(s): DOE/ER/10860-1; ON: DE82007806
• Country of Publication: United States
• Language: English

Related Subjects

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
CHEMICAL REACTIONS
DIFFERENTIAL EQUATIONS
DISSOCIATION
ENERGY LEVELS
EQUATIONS
EXCITED STATES
FLUIDS
GASES
INFRARED SPECTROMETERS
MANY-BODY PROBLEM
MEASURING INSTRUMENTS
MOLECULES
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
PHOTOACOUSTIC SPECTROMETERS
PHOTOCHEMICAL REACTIONS
RECOMBINATION
RICCATI EQUATION
SPECTROMETERS
VIBRATIONAL STATES