[Gate-users] source definition

[Marcin Balcerzyk]

Dear Ali.

 

Try using ion source of general type. The example to use Na-22 source is:

 

/gate/source/SourceNa/setActivity 0.000015 Ci

/gate/source/SourceNa/gps/particle ion

/gate/source/SourceNa/gps/ion 11 22 0 0

/gate/source/SourceNa/gps/monoenergy 0. keV

 

The funny monoenergy is for the kinetic energy of the ion. There is some
explanation of the "particle" command in section 7.2.2 Defining a type of
source of Users Guide v.5.0.0. If you run this definition of a source on
Gate (that happened with my old v.3.0.0) it will give you the info that some
files are missing -these are PhotonEvaporation data. Also add GEANT4
variable to your environment:

 

G4LEVELGAMMADATA=/opt/gate/geant48/data/PhotonEvaporation2.0 (it should
point to your directory)

 

Photon evaporation data are here
http://www.geant4.org/geant4/support/source/PhotonEvaporation.2.0.tar.gz
-thesea are ASCII files. Unpack them to the directory above in
G4LEVELGAMMADATA.

 

Ion source is slow, but contains all required data - as this is ascii file,
check in the Iodine 131 definition, if all what you need is there. Check if
this is for your version of Geant4, but my experience is that it does not
matter so much.

 

Marcin Balcerzyk

Universidad Compultense de Madrid

 

Message: 2

Date: Mon, 24 Aug 2009 01:03:48 +0430

From: AliAsghar Parach <aaparach at gmail.com>

Subject: [Gate-users] source definition

To: Gate-users at lists.healthgrid.org,

      gate-users-request at lists.healthgrid.org

Message-ID:

      <ebd3a0160908231333k5a6d9fdft701aefa7b4666c58 at mail.gmail.com>

Content-Type: text/plain; charset="iso-8859-1"

 

dear gate users,

I require to use radionuclides with multiple radiation type(

gamma,X,beta,electron) each with different energy and different abundance.

How can I use these radionuclides in GATE source definition for Dosimetry
application?

(specially beta and x-rays has the energy spectrum(not exact Monoenergy).)
An example of emission types for one of these radionuclides (131I) is in
attachment.(according to RADAR and MIRD data).

 

--

Ali Asghar Parach,Ph.D. student in Medical Physics,Tarbiat Modares
University,Tehran,Iran

 

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