<div dir="ltr">Hi Josh,<div><br></div><div>You can disable it using the following command:</div><div><br></div><div>/process/inactivate annihil<br></div><div><br></div><div>You need to initialize first to activate the physics before disabling one of the processes. As an example:</div><div><br></div><div># P H Y S I C S<br><br>/gate/physics/addPhysicsList emstandard_opt3<br>/gate/physics/addProcess RadioactiveDecay<br><br>/gate/run/initialize<br><br>/process/inactivate phot all<br>/process/inactivate Rayl all<br>/process/inactivate annihil<br></div><div><br></div><div><br></div><div><br></div><div>My regards,</div><div>Eslam</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Oct 18, 2021 at 10:34 PM Josh Knowland <<a href="mailto:jknowland@lucernodynamics.com">jknowland@lucernodynamics.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US" style="overflow-wrap: break-word;">
<div class="gmail-m_3089230358056796114WordSection1">
<p class="MsoNormal">All – <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I am trying to remove positron annihilation from a simulation but can’t get it to work. I have used the following physics setup:<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><b>/gate/physics/addPhysicsList emstandard<u></u><u></u></b></p>
<p class="MsoNormal" style="margin-left:0.5in"><b>/gate/physics/addProcess RadioactiveDecay<u></u><u></u></b></p>
<p class="MsoNormal" style="margin-left:0.5in"><b>/gate/physics/removeProcess PositronAnnihilation e+<u></u><u></u></b></p>
<p class="MsoNormal" style="margin-left:0.5in"><b>/gate/physics/removeProcess G4PositronAnnihilation e+<u></u><u></u></b></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">But I am still getting annihilation hits followed by gamma Compton scatter. I would like no annihilation photons to be generated.
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I used the command <b>“</b><b>/gate/physics/processList Enabled”</b> and it does not list annihilation as being enabled. Does the physics list hide it until initialization? If so, how can I disable it?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thank you all,<u></u><u></u></p>
<p class="MsoNormal">Josh<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
_______________________________________________<br>
Gate-users mailing list<br>
<a href="mailto:Gate-users@lists.opengatecollaboration.org" target="_blank">Gate-users@lists.opengatecollaboration.org</a><br>
<a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users" rel="noreferrer" target="_blank">http://lists.opengatecollaboration.org/mailman/listinfo/gate-users</a></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="rtl" class="gmail_signature"><div dir="rtl"><div style="text-align:left">____________</div><div style="text-align:left"><div><div><div>Eng. Eslam Mohammad Taha</div><div>Medical Physics Engineer</div><div>Nuclear Engineering Department</div><div>King Abdulaziz University</div><div>Jeddah, Saudi Arabia</div><div>Mobile: +966556537833</div></div><div>Email: <a href="mailto:ebarzangy@stu.kau.edu.sa" target="_blank"><font color="#1155cc">emtaha@kau.edu.sa</font></a></div></div><div><br></div><div><font color="#999999" size="1">This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error </font><font color="#999999" size="1">please notify me immediately and delete this message from your computer system</font><font color="#999999" size="1">. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.</font></div></div></div></div>
<br>
<div><font color="#808080" face="Arial, Helvetica, sans-serif">Disclaimer: The information contained in this message is intended for the addressee only and may contain classified information. If you are not the addressee, please delete this message and notify the sender; you should not copy or distribute this message or disclose its contents to anyone. Any views or opinions expressed in this message are those of the individual(s) and not necessarily of the university. No reliance may be placed on this message without written confirmation from an authorized representative of its contents. No guarantee is implied that this message or any attachment is virus free or has not been intercepted and amended. </font></div><div><font color="#808080" face="Arial, Helvetica, sans-serif"><br></font></div><div><font color="#808080" face="Arial, Helvetica, sans-serif">إخلاء مسؤليه: ان جميع المعلومات المتضمنة في هذه الرسالة تخص المستلم، وربما تتضمن معلومات سرية، واذا لم تكن انت المستلم فالرجاء الغاء الرسالة واشعار المرسل، كما يمنع نسخ او توزيع هذه الرسالة او افشاء محتوياتها لاخرين. ويجدر بالعلم ان جميع الآراء ووجهات النظر الواردة في هذه الرسالة تعتبر شخصية وليست بالضرورة منسوبة للجامعة. كما لايمكن ان يعتمد على هذه الرسالة ما لم تحصل على موافقة خطية من المسئول عن محتوياتها. كما لايوجد ضمان بان هذه الرسالة أو مرفقاتها خالية من الفيروسات أو انها لم يتم اعتراضها وتعديلها</font></div><div><br></div>