[Gate-users] Source am-241 how to add?

Sun Jan 25 22:06:44 CET 2015

Hi Michal,

Please see the lines below for the definition of the ion source,
but note, this will give you mainly the alpha particles!!
If you are interested in the gamma emission only, you might better
use a simple gamma source instead replace “ion" by “gamma”.

I have also attached an old article of David Kuhl, one of the real
pioneers in Medical Imaging, where the use of Am-241 is explained
in more details.
If you use the ion source, you mostly get the alpha. Those you have to
stop in a small source volume in order to filter out the gamma contribution
which is about 35% if I remember correctly.

Kind regards,

Uwe

PS: If you do not succeed, please send the full macro collection that
I (or others) can check it.

-----
------------------------------------------------------------
#
# S O U R C E S
#

# source: ion
/gate/source/addSource        IonSource

/gate/source/IonSource/setActivity        {SourceActivity}

/gate/source/IonSource/gps/type Volume
/gate/source/IonSource/gps/shape Sphere
#/gate/source/IonSource/gps/radius 0.1 mm
/gate/source/IonSource/gps/radius {SourceRad}
/gate/source/IonSource/gps/centre 0.0 0.0 0.0 cm

##
## universal ion source
## with arbitrary halflife
##
/gate/source/IonSource/gps/particle ion
#
# —————NOTE: The ION source is specified like <<<<<<<<<<<<<<<<<<<<<<<<<<<<<
#/gate/source/IonSource/gps/ion  Z-value A-value !!! see next line
/gate/source/IonSource/gps/ion 95  241 0 0
/gate/source/IonSource/setForcedUnstableFlag true
/gate/source/IonSource/setForcedHalfLife 99999999.0 s
/gate/source/IonSource/gps/energytype Mono
/gate/source/IonSource/gps/monoenergy 0. MeV
/gate/source/IonSource/gps/number 1

/gate/source/IonSource/gps/angtype iso
/gate/source/IonSource/gps/mintheta 0. deg
/gate/source/IonSource/gps/maxtheta 180. deg
/gate/source/IonSource/gps/minphi 0. deg
/gate/source/IonSource/gps/maxphi 360. deg

/gate/source/list

/----------------------------------------------------------------------
Prof. Dr. Uwe Pietrzyk
Diplom-Physiker
Institut für Neurowissenschaften und Medizin / INM-4
Forschungszentrum Jülich GmbH
52425 Jülich
Tel: +49-2461-61 4763
Fax: +49-2461-61 2820
Mobil: +49-162-103-4871
eMail: U.Pietrzyk at fz-juelich.de<mailto:U.Pietrzyk at fz-juelich.de>
http://www.fz-juelich.de/inm/inm-4/DE/Home/home_node.html
&
Bergische Universität Wuppertal
Fachbereich C - Physik / D.08.01
Gaußstr. 20
42097 Wuppertal
Tel: +49-(0)202-439-3523
Fax: +49-(0)202-439-2811
eMail: Uwe.Pietrzyk at physik.uni-wuppertal.de<mailto:Uwe.Pietrzyk at physik.uni-wuppertal.de>
http://www.medizinphysik.uni-wuppertal.de<http://www.medizinphysik.uni-wuppertal.de/>
----------------------------------------------------------------------/

On 25 Jan 2015, at 19:50, Michal Knap <michal.knap at gmail.com<mailto:michal.knap at gmail.com>> wrote:

Can You tell me if this is correct for AM-241 and Tc-m99? Mayby something is too much or something is missing? I still have empty root file and i dont know why...

# Phisics
/gate/physics/addProcess PhotoElectric
/gate/physics/processes/PhotoElectric/setModel StandardModel
/gate/physics/addProcess Compton
/gate/physics/processes/Compton/setModel StandardModel
/gate/physics/addProcess RayleighScattering
/gate/physics/processes/RayleighScattering/setModel PenelopeModel
/gate/physics/addProcess ElectronIonisation
/gate/physics/processes/ElectronIonisation/setModel StandardModel e-
/gate/physics/processes/ElectronIonisation/setModel StandardModel e+
/gate/physics/addProcess Bremsstrahlung
/gate/physics/processes/Bremsstrahlung/setModel StandardModel e-
/gate/physics/processes/Bremsstrahlung/setModel StandardModel e+
/gate/physics/addProcess PositronAnnihilation
/gate/physics/addProcess MultipleScattering e+
/gate/physics/addProcess MultipleScattering e-
#
# for ion source
/gate/physics/addPhysicsList emstandard
/gate/physics/addProcess RadioactiveDecay
/gate/physics/processList Enabled
/gate/physics/processList Initialized
#
# blurring
/gate/digitizer/Singles/insert blurring
/gate/digitizer/Singles/blurring/setResolution 0.15
/gate/digitizer/Singles/blurring/setEnergyOfReference 10. keV
/gate/digitizer/Singles/insert spblurring
/gate/digitizer/Singles/spblurring/setSpresolution 2.0 mm
/gate/digitizer/Singles/spblurring/verbose 0
#
# thresholder
/gate/digitizer/Singles/insert thresholder
/gate/digitizer/Singles/thresholder/setThreshold 1. keV
/gate/digitizer/Singles/insert upholder
/gate/digitizer/Singles/upholder/setUphold 15. keV
/gate/random/setEngineName JamesRandom
/gate/random/setEngineSeed default
/gate/random/verbose 1
#
# S O U R C E - Gamma - Ameryk
/gate/source/addSource AM-241
/gate/source/AM-241/gps/energytype Mono
/gate/source/AM-241/gps/particle ion
/gate/source/AM-241/gps/energy 59. keV
/gate/source/AM-241/setActivity 100. Bq
/gate/source/AM-241/gps/angtype iso
/gate/source/AM-241/gps/mintheta 90. deg
/gate/source/AM-241/gps/maxtheta 90. deg
/gate/source/AM-241/gps/minphi 0. deg
/gate/source/AM-241/gps/maxphi 360. deg
/gate/source/list
/gate/source/AM-241/gps/confine source_vol
/gate/output/verbose 2
/run/verbose 0
/event/verbose 0
/tracking/verbose 0
#
# Source shape
/gate/source/AM-241/gps/type Volume
/gate/source/AM-241/gps/shape Cylinder
/gate/source/AM-241/gps/radius 1 cm
/gate/source/AM-241/gps/halfz 1 mm
/gate/source/AM-241/gps/centre 11.2 0. 0. cm

Best regards
Michał Knap

Z wyrazami szacunku
Michał Knap

2015-01-20 12:33 GMT+01:00 Jenny Nilsson <jenny.nilsson at radfys.gu.se<mailto:jenny.nilsson at radfys.gu.se>>:

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