[Gate-users] Scattering in the back-to-back source of gamma quanta

[Pietrzyk, Uwe]

Hi Pawel,

the simplest way is to define a phantom of the same size als
the source volume and define it as PhantomSD:

/gate/source_vol/attachPhantomSD

Then you can define the type of material in the same way as you
would do for any phantom. In Gate_v7.1 you can make sure to have
all relevant processes being switched on by using:

/gate/physics/addPhysicsList emstandard_opt3

Hope this helps!

Kind regards,

Uwe
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On 08 Jan 2016, at 10:06, Pawe Kowalski <pawkowalski at yahoo.com<mailto:pawkowalski at yahoo.com>> wrote:

Hi,

In my simulations I have volume source of back-to-back gamma quanta.
I would like to ask if this is possible to have some Compton or Rayleigh scatterings in this source?
If space around source is a vacuum, then source is also treated as a vacuum? Going forward, if space around source is an air, then source is also treated as an air?

My definition of source:

#=====================================================
# linear source
#=====================================================

/gate/source/addSource linear gps

/gate/source/linear/gps/type Volume
/gate/source/linear/gps/shape Cylinder
/gate/source/linear/gps/radius 3.2 mm
/gate/source/linear/gps/halfz 35. cm
/gate/source/linear/gps/pos/centre 0. -45. 0. mm

/gate/source/linear/setActivity 5000000 Bq
/gate/source/linear/setType backtoback
/gate/source/linear/gps/particle gamma
/gate/source/linear/gps/ene/mono 511. keV
/gate/source/linear/gps/angtype iso

/gate/source/list

Best regards,
Paweł Kowalski
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