[Gate-users] How to use x-ray spectra generated by Spektr as GPS source with user-defined energy histogram in GATE CT simulation

[meghatuyan at yahoo.co.in]

Dear experienced GATE users,

I have generated an  x-ray spectra by using Spektr program (Siewerdsen, Boone and Siebert) for an x-ray tube potential of 120 kV at a constant 1 mAs and a total filtration of 11.8 mm Al. I, would like to use the generated x-ray spectra as GPS point source with user-defined energy histogram or arbitrary point-wise spectrum (whatever suitable) in CT simulation with GATE.
 
Here I have  tried one using user-defined energy histogram for use GATE Simulation of CT. But I am not  sure. So, please have a look at the file attached and correct me if I am wrong. The first column of the histogram is the energy bin in MeV in the x-ray spectra and the 2nd column is the photon fluence (photons per sq mm) in the x-ray spectra as weight of the histogram.  

Any suggestion/modification/comments on the above matter will be highly appreciated.

Thanking you in advance.

Regards,
S. Megha Singh
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