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Hi Zhengzhi and Tien-Phong,</div>
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Please refer to <a href="https://opengate.readthedocs.io/en/latest/setting_up_the_physics.html#" id="LPlnk903858">
https://opengate.readthedocs.io/en/latest/setting_up_the_physics.html#</a> for information on physics list. The implementation suggested by Zhengzhi is being deprecated and should not be used. Rather, use the physics list builder mechanism:</div>
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<span>/gate/physics/addPhysicsList emstandard_opt4<br>
</span></div>
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<span>/gate/physics/addProcess RadioactiveDecay</span></div>
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<span>You may replace emstandard_opt4 with the physics list builder most suitable for your needs (see
<a href="http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/PhysicsListGuide/html/index.html" id="LPlnk759400">
http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/PhysicsListGuide/html/index.html</a> for more info on physics lists.) Also, t<span>he following line may be required with your source definition to ensure that your Cu-64 source has no kinetic energy:</span><br>
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<span>/gate/source/pointSource/gps/energy 0 MeV</span></div>
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<span>Regards,</span></div>
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<span>Matthew</span></div>
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<span><br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Gate-users <gate-users-bounces@lists.opengatecollaboration.org> on behalf of Zhengzhi Liu <zliu36@stanford.edu><br>
<b>Sent:</b> March 2, 2020 1:22 PM<br>
<b>To:</b> Tien-Phong PHAM <tienphong.pham@laposte.net><br>
<b>Cc:</b> gate-users <gate-users@lists.opengatecollaboration.org><br>
<b>Subject:</b> Re: [Gate-users] 64 Cu positron spectra problem</font>
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<div dir="ltr">Hi Tien-Phong,
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<div>Below is my physics.mac Could you compare this with yours? You might have missed something in your physics.mac. </div>
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<div>Good luck,</div>
<div>Zhengzhi </div>
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<div>#-------------------oooooOOOOO00000OOOOOooooo---------------------#<br>
# #<br>
# P H Y S I C A L P R O C E S S E S #<br>
# #<br>
#-------------------oooooOOOOO00000OOOOOooooo---------------------#<br>
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/gate/physics/addProcess PhotoElectric<br>
/gate/physics/processes/PhotoElectric/setModel StandardModel<br>
<br>
/gate/physics/addProcess Compton<br>
/gate/physics/processes/Compton/setModel StandardModel<br>
<br>
/gate/physics/addProcess RayleighScattering<br>
/gate/physics/processes/RayleighScattering/setModel PenelopeModel<br>
<br>
/gate/physics/addProcess ElectronIonisation<br>
/gate/physics/processes/ElectronIonisation/setModel StandardModel e-<br>
/gate/physics/processes/ElectronIonisation/setModel StandardModel e+<br>
<br>
/gate/physics/addProcess Bremsstrahlung<br>
/gate/physics/processes/Bremsstrahlung/setModel StandardModel e-<br>
/gate/physics/processes/Bremsstrahlung/setModel StandardModel e+<br>
<br>
/gate/physics/addProcess PositronAnnihilation<br>
<br>
/gate/physics/addProcess eMultipleScattering e+<br>
/gate/physics/addProcess eMultipleScattering e-<br>
<br>
/gate/physics/processList Enabled<br>
/gate/physics/processList Initialized<br>
<br>
/gate/physics/addProcess IonIonisation<br>
/gate/physics/addProcess RadioactiveDecay<br>
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<br>
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<div dir="ltr" class="x_gmail_attr">On Mon, Mar 2, 2020 at 6:15 AM Tien-Phong PHAM <<a href="mailto:tienphong.pham@laposte.net">tienphong.pham@laposte.net</a>> wrote:<br>
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<p>Dear Gate-users,</p>
<p>I’m trying to simulate the energy spectrum of a Cu-64 source using the ion definition in GATE v8.2, but i have a problem with the positron emission spectra. In fact, the energy distribution with my ion source is very different with spectral definition in
the low energy region. I mean the energy spectrum of positron is similar to the energy spectrum of electron.</p>
<p>In this case, i just used the « RadioactiveDecay » as physics list</p>
<p>I would like to ask if someone has experience with ion type source can help me.</p>
<p>Many thanks for your help !<img id="x_gmail-m_7204315926884882512EDA6169A-608B-48A1-9684-15705A3482A1" style="max-width: 100%; height: auto;" data-outlook-trace="F:1|T:1" src="cid:1709c433b969093c11c1"></p>
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