Theoretical predictions for photoacoustic signal: Fractionary thermal diffusion with modulated light absorption source
Departamento de Física, Universidade Estadual de Ponta Grossa, 84030-900, Ponta Grossa, PR, Brazil
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Accepted: 17 July 2019
Published online: 2 December 2019
We develop a theoretical framework, in the context of the anomalous thermal diffusion, for the photoacoustic signal. We obtain analytical predictions for the open photoacoustic cell technique by considering the thermal diffusion and thermoelastic bending effects. In these contexts, we consider different conditions for the thermal diffusivity, coefficient of optical absorption, the sample thickness and the amplitudes of thermal diffusion and thermoelastic bending contributions. Furthermore, opaque samples are also simulated as a special case of the optically transparent samples.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019