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The photoacoustic effect generated by an incompressible sphere
The Journal of the Acoustical Society of America, 2002An incompressible sphere with a vanishing thermal expansivity suspended in a fluid can generate a photoacoustic effect when the heat deposited in the sphere by a light beam diffuses into the surrounding liquid causing it to expand and launch a sound wave.
Gerald J, Diebold +2 more
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Photoacoustic observation of the exciton effect in GaSe
Applied Optics, 1985Photoacoustic and absorption spectra of single crystals of GaSe at room temperature have been studied in the neighborhood of the intrinsic absorption edge. Analysis of the spectra showed formation of excitons. This is the first time that the exciton effect has been observed with photoacoustic spectroscopy.
D M, Todorovic, P M, Nikolic
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Photoacoustic effect in solids: influence of heat loss
Applied Optics, 1980The effects of taking into account the heat loss on the production of the photoacoustic signal are presented. A comparison with the previous results is also made.
R, Santos, L C, Miranda
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Photoacoustic and Mirage Effect on Liquids
1990The temperature oscillation accompanying the photoacoustic effect (PAE) generates a periodic variation of vapor pressure P or the molar concentration χC in the transducer gas near the liquid surface /1/. Since χ is the mole fraction of the vapor and C the total concentration of the transducer gas, (1-χ)C is the molar concentration of the air in the ...
P. Korpiun +3 more
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Photoacoustic effect demonstration
American Journal of Physics, 1982William F. Rush, James E. Heubler
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Theory of the photoacoustic effect in condensed matter
Applied Optics, 1982The basic equations governing the photoacoustic effect in condensed matter are derived based on themoelastic considerations. A general solution is given for the case when the pulsed light beam is used as the activation source. Some special cases where thermal diffusion is negligible are discussed.
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Scattered light effects in photoacoustic spectroscopy
Applied Optics, 1976J F, McClelland, R N, Kniseley
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Thermodynamic Models of the Photoacoustic Effect
1984The source of the acoustic signal is the heat, in whatever manner it may be created from the energy of light absorbed by the sample. The whole process, beginning with the created heat eQ and ending when the pressure signal eP arrives at the acoustical detector, can be described using the formalism of thermodynamics.
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Theory of the photoacoustic effect with solids
, 1975A. Rosencwaig, A. Gersho
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