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Thank you very much for your response, the problem seems to be
exactly as you describe it. It looks like it ignores any time
settings I define and takes the time of the simulation to be that
which makes the source run out of activity. <br>
<br>
I have encountered this problem when simulating a Na22 source with
GATE 7.1 and geant4.10.01.p02, and a colleague of mine has the same
problem with GATE 6.1 and Geant4 9.4 (she wanted to simulate 176
Lutetium). <br>
<br>
I tried to read through the Geant4 code and I can't figure out why
the function SetPDGLifeTime() would ignore the attempt to modify the
lifetime of an ion, but my programming knowledge isn't that deep. <br>
<br>
Thanks again. <br>
<br>
Enrique Muñoz<br>
<br>
<div class="moz-cite-prefix">On 04/01/16 09:37, STRYDHORST Jared
wrote:<br>
</div>
<blockquote
cite="mid:9AB82962C0EE2E49AA2CC04530A29587A4CAF2@EXDAG0-B0.intra.cea.fr"
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<div style="direction: ltr;font-family: Tahoma;color:
#000000;font-size: 10pt;">What version of GATE and Geant4 are
you using and what ion?<br>
GATE schedules the decay of ions itself according to the
activity set by the user. To do so, it calls a function that
sets the lifetime of the ion in Geant4 to zero so it decays
immediately when it's created. However, in version 10 (.1?, .2?
I don't know exactly when the change was made.) of Geant4, the
function (SetPDGLifeTime()) now ignores any attempts to modify
the lifetime of an ion. So the ion is created by GATE, but then
Geant4 calculates the decay time according to the real half-life
of the ion.<br>
<div><br>
<div style="font-family:Tahoma; font-size:13px">
<div style="font-family:Tahoma; font-size:13px">
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style="font-size:10pt">
<div class="PlainText">Jared STRYDHORST<br>
<br>
<span lang="fr">
<div style="margin:0"><font
face="Calibri,sans-serif" size="2"><span
style="font-size:11pt"><font
face="Cambria,serif" size="2"><span
style="font-size:10pt">Laboratoire
Imagerie Moléculaire In Vivo (IMIV)</span></font><font
face="Cambria,serif" size="2"><span
style="font-size:10pt"><br>
UMR 1023 Inserm/CEA/Université Paris
Sud - ERL 9218 CNRS</span></font></span></font></div>
<div style="margin:0"><font
face="Calibri,sans-serif" size="2"><span
style="font-size:11pt"><font
face="Cambria,serif" size="2"><span
style="font-size:10pt">CEA/I2BM/Service
Hospitalier Frédéric Joliot</span></font></span></font></div>
<div style="margin:0"><font
face="Calibri,sans-serif" size="2"><span
style="font-size:11pt"><font
face="Cambria,serif" size="2"><span
style="font-size:10pt">4, place du
Général Leclerc</span></font><font
face="Cambria,serif" size="2"><span
style="font-size:10pt"><br>
91401 ORSAY Cedex</span></font><font
face="Cambria,serif" size="2"><span
style="font-size:10pt"><br>
</span></font><font face="Cambria,serif"
size="2"><span style="font-size:10pt"></span></font><font
face="Cambria,serif" size="2"><span
style="font-size:10pt"><br>
</span></font><a moz-do-not-send="true"
href="mailto:karima.ait-aissa@cea.fr"
target="_blank"><font
face="Cambria,serif" size="2"><span
style="font-size:10pt"></span></font></a></span></font></div>
<div style="margin:0"><font
face="Calibri,sans-serif" size="2"><span
style="font-size:11pt"><a
moz-do-not-send="true"
href="http://i2bm.cea.fr/dsv/i2bm/shfj/imiv"
target="_blank"><font
face="Cambria,serif" size="2"><span
style="font-size:10pt"><a class="moz-txt-link-freetext" href="http://i2bm.cea.fr/dsv/i2bm/shfj/imiv">http://i2bm.cea.fr/dsv/i2bm/shfj/imiv</a></span></font></a></span></font></div>
</span></div>
</span></font></div>
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<div style="font-family: Times New Roman; color: #000000;
font-size: 16px">
<hr tabindex="-1">
<div style="direction: ltr;" id="divRpF827642"><font
color="#000000" face="Tahoma" size="2"><b>De :</b>
<a class="moz-txt-link-abbreviated" href="mailto:gate-users-bounces@lists.opengatecollaboration.org">gate-users-bounces@lists.opengatecollaboration.org</a>
[<a class="moz-txt-link-abbreviated" href="mailto:gate-users-bounces@lists.opengatecollaboration.org">gate-users-bounces@lists.opengatecollaboration.org</a>] de la
part de Enrique Muñoz Albaladejo
[<a class="moz-txt-link-abbreviated" href="mailto:Enrique.Munoz@ific.uv.es">Enrique.Munoz@ific.uv.es</a>]<br>
<b>Envoyé :</b> lundi 21 décembre 2015 12:32<br>
<b>À :</b> <a class="moz-txt-link-abbreviated" href="mailto:gate-users@lists.opengatecollaboration.org">gate-users@lists.opengatecollaboration.org</a><br>
<b>Objet :</b> [Gate-users] Ion source - timestamp problem
GATE 6.1<br>
</font><br>
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<p class="MsoNormal" style="margin:0px; color:rgb(34,34,34);
font-size:12.8px; font-style:normal; font-variant:normal;
font-weight:normal; letter-spacing:normal;
line-height:normal; text-align:start; text-indent:0px;
text-transform:none; white-space:normal; widows:1;
word-spacing:0px; background-color:rgb(255,255,255)">
<span style="font-size:10pt; color:black" lang="EN-GB">Dear
all,<br>
</span></p>
<p class="MsoNormal" style="margin:0px; color:rgb(34,34,34);
font-size:12.8px; font-style:normal; font-variant:normal;
font-weight:normal; letter-spacing:normal;
line-height:normal; text-align:start; text-indent:0px;
text-transform:none; white-space:normal; widows:1;
word-spacing:0px; background-color:rgb(255,255,255)">
<br>
<span style="font-size:10pt; color:black" lang="EN-GB"></span><span
style="font-size:10pt; color:black" lang="EN-GB"></span></p>
<p class="MsoNormal" style="margin:0px; color:rgb(34,34,34);
font-size:12.8px; font-style:normal; font-variant:normal;
font-weight:normal; letter-spacing:normal;
line-height:normal; text-align:start; text-indent:0px;
text-transform:none; white-space:normal; widows:1;
word-spacing:0px; background-color:rgb(255,255,255)">
<span style="font-size:10pt; color:black" lang="EN-GB">I
am trying to use an ion source for a PETscanner.</span><span
style="font-size:10pt; color:black" lang="EN-GB"></span></p>
<p class="MsoNormal" style="margin:0px; color:rgb(34,34,34);
font-size:12.8px; font-style:normal; font-variant:normal;
font-weight:normal; letter-spacing:normal;
line-height:normal; text-align:start; text-indent:0px;
text-transform:none; white-space:normal; widows:1;
word-spacing:0px; background-color:rgb(255,255,255)">
<span style="font-size:10pt; color:black" lang="EN-GB">The
simulation provides strange values for the time stamp of
the singles.
<br>
The parameter "setTimeStop" was set to 50s, but the
timestamp of the first detected single was 3.4x10^17 s.</span><span
style="font-size:10pt; color:black" lang="EN-GB"></span></p>
<p class="MsoNormal" style="margin:0px; color:rgb(34,34,34);
font-size:12.8px; font-style:normal; font-variant:normal;
font-weight:normal; letter-spacing:normal;
line-height:normal; text-align:start; text-indent:0px;
text-transform:none; white-space:normal; widows:1;
word-spacing:0px; background-color:rgb(255,255,255)">
<span style="font-size:10pt; color:black" lang="EN-GB">I
would like to know if there is any solution to this
problem.</span><span style="font-size:10pt; color:black"
lang="EN-GB"></span></p>
<span style="font-size:10pt; color:black" lang="EN-GB">Best
regards</span><span style="font-size:10pt;
font-family:Arial; color:black"><font face="sans-serif">,<br>
<br>
Enrique</font><br>
</span></div>
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