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Forum: Processes Involving Optical Photons
Re: Question doubt regarding input properties in simulation
Date: 03 Jul, 2012
From: Gumplinger Peter <Gumplinger Peter>

Hi Esther,

As Athreya explained the interpolation was linear prior to 9.5 and is now spline since 9.5. The 9.5 code is:

http://www-geant4.kek.jp/lxr/source/global/management/src/G4PhysicsVector.cc#L504

while 9.4 was:

http://www-geant4.kek.jp/lxr/source/materials/src/G4MaterialPropertyVector.cc?v=9.4.p4#L150

In 9.4 and prior you were not allowed to have an optical photon in your simulation - in energy - for which you did not know, or specify, its property. In 9.5, the program simply uses the nearest specified value.

Peter

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