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: http://www.astro.spbu.ru/DOP/8-GLIB/op3/
Дата изменения: Fri Nov 19 12:11:22 2010 Дата индексирования: Thu Feb 27 21:03:06 2014 Кодировка: Поисковые слова: m 97 |
Optical properties of porous nonspherical particles |
Here we compare the optical properties of porous nonspherical particles of two kinds:
We calculate the dependence of the extinction and polarization cross-sections
on a size parameter
We consider spheroidal particles with the aspect ratio a/b = 1.4
The scatterers are divided in 3 groups: For each considered value of porosity P, we give first 8 figures on 1 page that show the dependence of the dimesionless extinction (Qext) and linear polarization (Qpol) cross-sections particles on their difraction parameter xv = 2 pi rv / lambda, where rv is the radius of a sphere which volume is equal to that of a nonspherical particle, lambda is the wavelength of incident radiation. Then we give 23 pages of figures showing variations of scattered light intensity (actually F11/g) and linear polarization degree (-F21/F11) with changes of the scattering angle theta for different values of xv. So, we have 24 pages with 8 figures for each of three porosity value P=0.1, 0.5, 0.9 (all together 672 figures). The figures show tha optical properties of 2, 4, 8, 16, 32 and 64-layered particles (thin lines) as well as the same shape homogeneous particles with the effective refractive index derived from Maxwell-Garnett, inverse Maxwell-Garnett Х Bruggeman rules (thick lines).
To compute these properties of the layered and homogeneous nonspherical particles
we used our new code based on the SVM method with a spherical basis.
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