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[en] Three- dimensional theory photo acoustic effect, taking into consideration anizotron coefficient heat conducting during monochromatic ray falling to the axis optic crystal side are presented in this article
Journal
Doklady Akademii Nauk Respubliki Tajikistan; ISSN 0002-3469; 
; CODEN DANTAL; v. XXXV-(9-10); p. 430-434
; CODEN DANTAL; v. XXXV-(9-10); p. 430-434
[en] The specific feature of the optoacoustic signals of the first and second sounds in the superfluid helium which boundaries with solids are investigated. Shown that the form of these signals are depend from duration of the laser impulse, coefficient of the optical absorption and velocity of the sounds. The numerical calculation of the form of these O A counters has been calculated
Journal
[en] The article studies peculates of sound generation in liquids with thermic relaxation laser impulse
Journal
Vestnik Natsionalnogo Universiteta; ISSN 1993-6923; ; v. 4(18); p. 56-59
; v. 4(18); p. 56-59
[en] The theory generation of the photoacoustic signal by supersensitive helium with thermal isolator substrate has been proposed. It was shown that amplitude and phase of the photoacoustic signal have important information's about thermo physics parameters of the sample and buffer gas
Journal
[en] The different equation for the stationary temperature of the superfluid helium have been obtained. Temperature field of the three layer model of photoacoustic cell with un thermal conductivity substrate and superfluid helium, which containing with own vapor has been found
Journal
[en] In article was studied peculiarities of sound excitation in liquids with thermic relaxation with laser irradiation modulated activity
Journal
Vestnik Natsionalnogo Universiteta; ISSN 1993-6923; ; v. 4(18); p. 45-47
; v. 4(18); p. 45-47
[en] In this article authors calculated the correlators of hydrodynamicalvalue, determined the spectral insensitivity of binary mixture through theinsensitivity of fluctuations of hydrodynamical values
Journal
[en] The influence of the thermal nonlinearity of substrate to the parameters of the second harmonic of photoacoustic signal of the opaque medium has been studied. General formula for the acoustic vibration of the pressure has been obtained. Shown that influence of the thermal nonlinearity of substrate on the amplitude of the second harmonic of the nonlinear photoacoustic signal for the thermal thin samples are considerably
Journal
[en] The numerical analysis of the amplitude of the second harmonic of the nonlinear photoacoustic signal of the thermal thin opaque mediums has been done. The high sensitivity of the nonlinear coefficient of the amplitude of the second harmonic to the thermal coefficients of the thermophysical values of then all mediums in P A cell, optical parameters and their thermal coefficient has been showed
Journal
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