8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-225-C7-228
Restoration of laser-induced process kinetics from photoacoustic measurementsO.V. Puchenkov1, 2
1 N.N. Andreev Acoustics Institute, 117036 Moscow, Russia
2 Biochemistry Department, The Weizmann Institute of Science, 76100 Rehovot, Israel
Reconstruction of the kinetics of relaxation processes induced in a medium by laser radiation is considered. Implementation of α-regularization algorithm of the ill-posed problem solution in optoacoustic (OA) diagnostics of liquids is discussed. The relationship between parameters of the diagnostic experimental set-up and the frequency band where relaxation spectra can be restored is established. The restoration algorithm is applied to analysis of OA-waveforms detected in aqueous solution near 4°C. It is shown that only broad-band detection could give necessary information for identification of particular relaxation mechanism in this case.
© EDP Sciences 1994