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Question Simulation is blocked 

Forum: Processes Involving Optical Photons
Date: 08 Oct, 2010
From: Ibrahim <Ibrahim>


I am using geant4 for x ray imaging physics purpose. When I irradiate the fluorescence screen Gd2O2S with X Rays, optical photons are created in Gd2O2S and spread into the Silicon where they must be detected. Silicon is divided into 1152 x 1254 pixels and the size of each pixel is 50 x 50 um. The program works well and I get the image of the object which I would like to image, but I am still having the following problem: If I want to get an image of high quality I have to irradiate the detector with 200 millions of X rays or 500 millions etc... I irradiated the detector with only 100 millions of X Rays and the calculation started running on my work station but after some hours the calculation was blocked and did not continue! Does anybody know why? I highly appreciate your suggestions and helps and thank you in advance.


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