[Gate-users] Creating a Y90 Ion source

[Nicholas Forwood]

Thanks Erwann, I have since discovered that I didnt have some data files in my
geant4 directory. I downloaded them off the geant4 website and the decay of Y90
seems to work.

>>> erwann rault <erwann.rault at ugent.be> 24/08/2009 6:37 pm >>>
Hi Nicholas,

The production of betas should be included in the decay of Y90. I think
you should check the range cut you set for the electrons
(/gate/physics/setElectronCut range mm). If this value is too big, the
simulation of the electrons will be stopped and their energy locally
deposited.

I hope this will help,


Erwann.

On Mon, 2009-08-24 at 08:52 +1000, Nicholas Forwood wrote:
> Thanks for that, I now see a lot of Y90 ions however another stupid question my
simulation does not seem to include any betas produced by decay of the Y90?
> 
> >>> Tianyu Ma <maty at tsinghua.edu.cn> 21/08/2009 5:14 pm >>>
> Hi Nicholas,
> Try if it works.
> 
> add the following sentence under "/gate/source/Y90Source/setActivity 50.
> becquerel":
> 
> /gate/source/Y90Source/gps/particle ion
> 
> Regards,
> 
> On Fri, Aug 21, 2009 at 2:36 PM, Nicholas Forwood <
> nforwood at stvincents.com.au> wrote:
> 
> > Hi everyone, I'm trying to make a Y90  ion source in a water phantom
> > however the
> > code does nothing. There appears to be nothing to track during the
> > simulation.
> > Everything works as expected when using e- particles or gamma but the ion
> > doesnt
> > function! I'm using Gate 5.0.0 and Geant 4.9.2
> >
> > Here is the code I use to define my source
> >
> > /gate/source/addSource Y90Source
> > /gate/source/Y90Source/setActivity 50. becquerel
> >
> >
> > /gate/source/Y90Source/gps/ion 39 90 0 0
> >
> > /gate/source/Y90Source/gps/energytype Mono
> > /gate/source/Y90Source/gps/monoenergy 0. keV
> > /gate/source/Y90Source/gps/number 1
> > /gate/source/Y90Source/setForcedUnstableFlag true
> > /gate/source/Y90Source/setForcedHalfLife 233280. s
> > /gate/source/Y90Source/gps/type Point
> >
> >
> > /gate/source/Y90Source/gps/angtype iso
> > /gate/source/Y90Source/gps/mintheta 0. deg
> > /gate/source/Y90Source/gps/maxtheta 180. deg
> > /gate/source/Y90Source/gps/minphi 0. deg
> > /gate/source/Y90Source/gps/maxphi 360. deg
> > /gate/source/Y90Source/gps/centre 0. 0. 0. cm
> > /gate/source/Y90Source/gps/confine NULL
> >
> > /gate/source/list
> >
> > any help?
> >
> > Cheers
> >
> >
> > Nick Forwood
> > Scientific Officer
> > Dept of Nuclear Medicine
> > St Vincent's Hospital
> >
> > PH: (02) 8382 2659
> > FAX: (02) 8382 2619
> >
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Erwann Rault
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