Method of Modeling Optoacoustic Signals in Composites Transparent Matrix – Metal Nanoparticles

Method of modeling optoacoustic signals initiated by a laser pulse in composites transparent matrix – metal nanoparticles taking into account melting processes has been developed and tested. The method consists in calculating the function of pressure sources depending on time and coordinate and its...

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Bibliographic Details
Published inRussian physics journal Vol. 62; no. 1; pp. 156 - 166
Main Authors Anan’eva, M. V., Zvekov, A. A., Kalenskii, A. V., Aduev, B. P.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.05.2019
Springer
Springer Nature B.V
Subjects
Aluminum
Amplitudes
Analysis
Composite materials
Condensed Matter Physics
Convolution
Detonators
Flux density
Hadrons
Heavy Ions
Lasers
Mathematical and Computational Physics
Methods
Modelling
Nanoparticles
Nondestructive testing
Nuclear Physics
Optical Devices
Optics
Pentaerythritol
PETN
Photonics
Physics
Physics and Astronomy
Polyols
Specific volume
Spectroscopy
Theoretical
Wave equations
laser irradiation
melting
optoacoustic spectroscopy
metal nanoparticles
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Summary:Method of modeling optoacoustic signals initiated by a laser pulse in composites transparent matrix – metal nanoparticles taking into account melting processes has been developed and tested. The method consists in calculating the function of pressure sources depending on time and coordinate and its convolution with the Green’s function of the one-dimensional wave equation. Testing has been performed for composites of pentaerythritol tetranitrate with 50 nm radius aluminum nanoparticles that are important for practical applications. The melting is characterized by an increase in the specific volume and leads to an increase in the amplitude of the maximum of the source function and the appearance of the area of its negative values. The dependences have been calculated of the effective growth constant of the optoacoustic signal and its amplitude on the pulse energy density that must be taken into account in this method. The results are important for the development of methods of nondestructive testing and prediction of functioning of photonic devices and optical detonators containing nanoparticles.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-019-01696-x