[Gate-users] cannot get gaussian energy distribution

[Andreas Tefre Samnøy]

Hi everyone

I am trying to make a simple proton beam where the energy distribution is
Gaussian.
The mean energy should be 13 MeV and the standard deviation should be 1
MeV. When I run the code under, and shoot it directly into a senstive
volume, all the recorded hits are 13 MeV. So i conclude that the beam is
actually mono energetic.
Can anybody tell me what is wrong in my code?

/gate/source/addSource                      beam     gps
/gate/source/beam/gps/particle          proton
/gate/source/beam/gps/energytype   Gauss
/gate/source/beam/gps/energy           13 MeV
/gate/source/beam/gps/sigmae          1 MeV

/gate/source/beam/gps/type    Beam
/gate/source/beam/gps/shape    Circle
/gate/source/beam/gps/centre    0 0 900 mm
/gate/source/beam/gps/radius    1 mm

/gate/source/beam/gps/angtype iso
/gate/source/beam/gps/mintheta 0 deg
/gate/source/beam/gps/maxtheta 0 deg
/gate/source/beam/gps/minphi 0 deg
/gate/source/beam/gps/maxphi 360 deg


Best Regards
Andreas Tefre Samnøy
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20181108/d487efce/attachment.html>