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<p>Hello Anestis,</p>
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<p>I am not a SPECT expert, but this sounds to me like a physics list issue. Which physics list are you using? Did you make sure that this physics list indeed includes the physics for alpha particles and nuclear decays?</p>
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<p>The reference documentation for physics is here:</p>
<p><a href="http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/PhysicsListGuide/html/index.html" class="OWAAutoLink" id="LPlnk573808" previewremoved="true">http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/PhysicsListGuide/html/index.html</a></p>
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<p>If you'd ask me to make a guess for the right list to use for your simulation, I'd pick "Shielding_EMZ". But take it with a grain of salt, because like I mentioned, I am not a SPECT expert.</p>
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<p>Hope that helps,<br>
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<p>/David<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> Gate-users <gate-users-bounces@lists.opengatecollaboration.org> im Auftrag von Anestis Nakas <A.Nakas@student.tudelft.nl><br>
<b>Gesendet:</b> Mittwoch, 5. Februar 2020 09:23:34<br>
<b>An:</b> gate-users@lists.opengatecollaboration.org<br>
<b>Betreff:</b> [Gate-users] APLHAS AND BETAS?</font>
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<p>Hello all,</p>
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<p>I am trying to take into acount alpha and beta emissions, apart from gammas, in a SPECT simulation. So far I have only gammas emitted from my source and I would like to take into acount the alphas and betas that my source emits, as well. For this purpose
I have the full spectrum of emissions (gammas, alphas, betas) of the radionuclide that interests me (it is Actinium 225 actually) taken from MIRD. </p>
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<p>However, in the GATE manual I found that this is possible for voxelized phantoms. In my study I am using a non voxelized phantom (NEMA IQ phantom), and I have sources confined in each out of six spheres, but only gamma emission so far.</p>
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<p>Any help or suggestions are welcomed,</p>
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<p><span style="font-size: 12pt;">Best Regards,</span></p>
<p><span style="font-size: 12pt;">Anestis </span></p>
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