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Keywords: Rayleigh scattering clarity optical photon
Forum: Processes Involving Optical Photons
Re: Question Problem with Rayleigh scattering (Yoann Sallaz-Damaz)
Date: 04 Oct, 2006
From: Gumplinger Peter <Gumplinger Peter>

The Rayleigh process requires a G4MaterialPropertiesTable to be filled by the user with Rayleigh scattering length data. The Rayleigh scattering attenuation length is the average distance traveled by a photon before it is Rayleigh scattered in the medium and it is the distance returned by the GetMeanFreePath method. The actual scattering length is then sampled from an exponential with this mean free path.

The Rayleigh process only scatters photons. It does not absorb them in any way. What you may need is also add the OpAbsorption process for photon bulk absorption.

Please refer to 5.2.5.4 Tracking of Photons in processes/optical in the Application Developers Manual.

Or, you may have the opposite problem where too many photons disappear (I can't quite understand your comment). In that case, it must be blamed on the surface reflectivity you have chosen or the OpAbsorption process.

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1 None: Re: Problem with Rayleigh scattering   (Clément DUPONT - 23 Feb, 2015)
2 None: Re: Problem with Rayleigh scattering   (Clément DUPONT - 23 Feb, 2015)
1 Feedback: Re: Problem with Rayleigh scattering   (Gumplinger Peter - 10 Mar, 2015)
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