A study into light scattering and absorption by aluminum nanoparticles in PETN

International Congress on Energy Fluxes and Radiation Effects

Aduev, B.^1 ; Nurmukhametov, D.^1 ; Zvekov, A.^1 ; Nikitin, A.^1

Institute of Chemistry of Coal and Material Science, Sovetsky av., 18, Kemerovo

650000, Russia^1

关键词: Absorption cross sections;    Aluminum nanoparticles;    Fresnel boundary conditions;    Light scattering and absorptions;    Pentaerythritol tetranitrate;    Radiative transfer equations;    Scattering and absorption;    Transmittance and reflectances;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/552/1/012032/pdf
DOI  :  10.1088/1742-6596/552/1/012032

来源: IOP

【 摘 要 】

The paper is devoted to experimental and theoretical research into nanopartides' optic properties in pentaerythritol tetranitrate (petn) matrix. A photometric sphere was applied for the transmittance and sum of transmittance and reflectance measurement of petn pressed pellets containing aluminum nanoparticles at the light wavelength 643 nm. The theory of light propagation in terms of spherical harmonics solution of radiative transfer equation in the slab geometry with Fresnel boundary conditions was developed. The properties of aluminum nanoparticles were evaluated in terms of Mie theory. The absorbed energy distribution inside the sample was calculated. It was shown that the Beer's type law is applicable approximately. The apparent light absorption cross section determined, which takes into account both scattering and absorption, is bigger than the geometrical one. The aluminum refractive index value, estimated during comparison of theory with the experimental data, agrees well with the handbook's data.