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Feedback Re: Bug in G4OpRayleigh constructor 

Forum: Processes Involving Optical Photons
Date: 26 Apr, 2004
From: Gumplinger Peter <Gumplinger Peter>

Hi Dmitry,

Thank you for your contribution to this Forum. I'll protect the code of G4OpRayleigh to check for the pointers: MaterialPropertiesTable and Rindex.

Moreover, I'll rewrite the BuildThePhysicsTable method to first look for aMaterialPropertiesTable and a property 'RAYLEIGH' for any material, including a material named "Water", and only if nothing has been defined by the user, define the Rayleigh scattering length for "Water" by calling the RayleighAttenuationLengthGenerator method.

At this point, many existing application may already rely on the above method being called by default from the G4OpRayleigh constructor, after the user simply defines 'Water' and its refractive index. I am hesitent, therefore, to require the user to set a private G4bool in G4OpRayleigh to invoke this feature.

In the next G4 release, if the user calls:


in his/her DetectorConstruction (DefineMaterial) for any material, even for 'Water', this will not be overwritten.

Thanks again for your feedback,


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