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A new basic analysis of pulsed photoacoustic signal usingthe finite differences method

Published online by Cambridge University Press:  25 June 2004

N. Benamar ,
E. Chatri ,
F. Lahjomri  and
R. M. Leblanc
N. Benamar*
Affiliation:
Département de physique, faculté des sciences de Meknès, Université Moulay Ismaïl, BP 4010, Beni M'hamed, Meknès, Morocco
E. Chatri
Affiliation:
Département de physique, faculté des sciences de Meknès, Université Moulay Ismaïl, BP 4010, Beni M'hamed, Meknès, Morocco
F. Lahjomri
Affiliation:
École Nationale des Sciences Appliquées de Tanger, Université Abdelmalek Essaâdi, route Ziaten, km 10, BP 1818, Tanger, Morocco
R. M. Leblanc
Affiliation:
Department of Chemistry, University of Miami, Cox Science Building, 1301 Memorial Drive, PO Box 249118, Miami, FL, 33124-0431, USA
*
nabil_benamar@yahoo.fr
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Abstract

Pulsed photoacoustic spectroscopy provides information about optical, thermal and geometrical characteristics of opaque materials. The aim of this paper is the analysis of the applicability of the finite differences method to simulate the process by which pulsed photoacoustic signal is generated by a pulsed heat source, both in time and frequency domains. The present study is extended to a two-layers absorbing system. This method is free of the limitations imposed by special cases when the analytical methods are used to resolve heat diffusion equations. This approach is analyzed through the temperature and pressure variations in the photoacoustic cell.

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Type
Research Article
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The European Physical Journal - Applied Physics , Volume 28 , Issue 2 , November 2004 , pp. 255 - 262
Copyright
© EDP Sciences, 2004

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