[Gate-users] how to specify I-123 energy distributions

[Panagiotis Papadimitroulas]

Dear Lee,

I am listing bellow an example of how to use a spectrum of an isotope that you want to simulate...
In my case I used a b- spectrum. 

/gate/source/addSource point_source 
/gate/source/point_source/gps/particle e-
#/gate/source/point_source/setActivity 2000 Bq
/gate/source/point_source/gps/type Point
/gate/source/point_source/gps/energytype Arb
/gate/source/point_source/gps/histname arb
/gate/source/point_source/gps/emin 0.0 MeV
/gate/source/point_source/gps/emax 0.4983 MeV

/gate/source/point_source/gps/histpoint    0.0    5670
/gate/source/point_source/gps/histpoint    0.004    5570
/gate/source/point_source/gps/histpoint    0.008    5470
/gate/source/point_source/gps/histpoint    0.014    5330
/gate/source/point_source/gps/histpoint    0.027    5080
/gate/source/point_source/gps/histpoint    0.037    4880
/gate/source/point_source/gps/histpoint    0.040    4820
/gate/source/point_source/gps/histpoint    0.050    4620
/gate/source/point_source/gps/histpoint    0.055    4520
/gate/source/point_source/gps/histpoint    0.074    4130
/gate/source/point_source/gps/histpoint    0.082    3980
/gate/source/point_source/gps/histpoint    0.095    3720
.
.
.
/gate/source/point_source/gps/arbint Lin
/gate/source/point_source/setForcedUnstableFlag true 
/gate/source/point_source/setForcedHalfLife 574560. s   
/gate/source/point_source/gps/angtype iso

So, in your case you have to define gammas instead of e- . Also the 1st column of the histpoint gives the intensity of the respectively energy, while the energy in the 2nd column is in MeV.. 
Hope it helps, for modifying your source.

Regards,
Panagiotis

##########################################
###   Panagiotis Papadimitroulas, Msc                                        
###   PhD candidate, Department of Medical Physics      
###   University of Patras                                                    
###   Greece                                                                           
###                                                                                           
###   email:        panpap_5 at hotmail.com       
###   web page: http://www.teiath.gr/stef/tio/ni/
###                       http://www.kagadis.gr

> From: slee91 at utk.edu
> To: gate-users at lists.opengatecollaboration.org
> Date: Wed, 9 May 2012 20:55:01 +0000
> Subject: [Gate-users] how to specify I-123 energy distributions
> 
> Hey guys!
> 
> I am trying to model a I-123 with the following energy distributions.
> 
> 1) 159 keV 83%
> 2) 346 keV 0.13%
> 3) 440 keV: 0.42%
> 4) 505 keV: 0.32%
> 5) 529 keV: 1.39%
> 6) 539 keV: 0.38%
> 
> for example, there is 83% chance that 159 keV gamma photon is emitted.
> 
> In this case, do I need to use arbitrary point-wise spectrum "Arb"? There seems to be no clear explanation of how to use this command in Gate manual. Can anyone point me to a good example of how to use arb?
> 
> Thanks,
> Sanghyeb(Sam) Lee
> 
> PhD Candidate 
> Department of Electrical Engineering and Computer Science
> University of Tennessee, Knoxville
> Personal webpage: www.sergeantlee.com
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