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Question GEANT4 optical processes units 

Forum: Processes Involving Optical Photons
Date: 02 Nov, 2012
From: Adam Glaser <Adam Glaser>

Hello everyone,

I am very new to GEANT4 and have primarily been using GEANT4 through GAMOS. My research is primarily focused on light transport, tissue optics, and diffuse spectroscopy. There are a number of MC codes to perform tissue optics simulations, but I see a unique opportunity with GEANT4 due to many of its already existing features.

I am creating a physics list with modified optical photon processes from those already offered in GEANT4 but have a simple usability question. In the tissue optics community, optical photons are generally thought of in terms of the wavelength (nm or um) and optical absorption/scattering a thought of as attenuation coefficients (inverse length) as opposed to attenuation lengths.

Is there anyway that this code be easily integrated into GEANT4's unit definitions (i.e., when expected an energy unit, if GEANT4 sees *nm it will automatically convert it to *eV, and if GEANT4 sees an attenuation coefficient *mm^-1 in the material properties table for optical processes, it will auto convert to *mm)?

Would this need to be addressed in GEANT4 or CLHEP?

Best, Adam

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1 Ok: Re: GEANT4 optical processes units   (Gumplinger Peter - 05 Nov, 2012)
(_ None: Re: GEANT4 optical processes units   (Michael H. Kelsey - 06 Nov, 2012)
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