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None Re: distribution of scattering angle in rayleigh scattering 

Forum: Processes Involving Optical Photons
Re: None distribution of scattering angle in rayleigh scattering (khoi nguyen)
Re: Feedback Re: distribution of scattering angle in rayleigh scattering (Gumplinger Peter)
Date: 22 Jun, 2012
From: khoi nguyen <khoi nguyen>

hi Peter,

i've read the link you gave me the other day (http://bugzilla-geant4.kek.jp/attachment.cgi?id=77&action=edit) and read the paper in the link above again, and i think i get it now:

in the paper: for unpolarized incident light:

sigma_scatt is average of sigma_HH and sigma_VV (<-- read the paper for the meaning of HH and VV).

sigma_VV is independent of the scattering angle theta (between incoming and outgoing momentum), sigma_HH has a minimum at 90 degrees. and that results in the (1+cos^2(theta))*sin(theta) distribution sigma_scatt as we have in GEANT4.

the figure 4 in the paper i referred to in my question above is only for sigma_VV, and that's why we see no dependency on theta when the size of the particle is much smaller than the wavelength lambda.

i'm sorry for not reading the paper carefully and bothering you with this stupid question.

khoi

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