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Hi Dania,<br>
<br>
I am not sure, if you can change the physics lists for different
volumes. I guess rather not. But I have different ideas that could
maybe help you:<br>
<br>
- Use cuts for the different particles in the different volumes. So
maybe you can sort out the particles that you don't want in your
phantom.<br>
- Same direction: use the kill actor to sort out particles that you
don't want.<br>
- Other idea: split up your simulation in 2 with the use of phase
space as actor in the first and as source in the second. See here:
how to separate the phantom and detector tracking - phase space
approach:
<a class="moz-txt-link-freetext" href="http://wiki.opengatecollaboration.org/index.php/Users_Guide:How_to_run_Gate#How_to_separate_the_phantom_and_detector_tracking_-_Phase_space_approach">http://wiki.opengatecollaboration.org/index.php/Users_Guide:How_to_run_Gate#How_to_separate_the_phantom_and_detector_tracking_-_Phase_space_approach</a><br>
<br>
Good luck!<br>
Katrin<br>
<br>
<br>
<div class="moz-cite-prefix">On 26/07/2018 11:19, Dania Consuegra
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAEjVn2AX-hA7VCJP4SEjG_C_Hi-F9FuWs-WeueU0w459NAMUGw@mail.gmail.com">
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<div>Dear Gate user,</div>
<div><br>
</div>
<div>- I would like to know if it is possible to set and
specific Physics (just with few processes) for and specific
volume of my geometry and a more complicated one for the rest
of my geometry....</div>
<div>My problem is that when I use a 18F source with all the
Physics enable for all the geometry I have Cherenkov Photon
production even in the Phantom, then my simulation
becomes very slow and at some point stop the computer because
needs more than 7GiB of memory ....</div>
<div>For the phantom I just need to take into account the basic
processes (PhotoElectric, Compton etc, but not the Optical
ones neither Scintillation or Chererenkov)....</div>
<div><br>
</div>
<div>- I also have the following question about the time
information that it is stored in Singles output.root....</div>
<div>t1 and t2 correspond to the first Cherenkov Photon detected
<span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">in
each direction</span>, or it is a time1, time2 average of
all the detected Cherenkov Photon per/ <span
style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">511
keV </span>gamma in each direction.... </div>
<div><br>
</div>
<div>Any help I would really appreciate it.... </div>
<div><br>
</div>
<div><span
style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Kind
regards,</span><br
style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">
<br
style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">
<span
style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Dania
Consuegra Rodríguez</span><br
style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">
<br
style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">
<span
style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Phd
student Jožef Stefan Institute</span><br>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
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