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<TITLE>RE: [Gate-users] Interaction point</TITLE>
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<P><FONT SIZE=2>If you ouput hit data file, you will definitely know where<BR>
the opticalphoton generated by looking for particles with<BR>
name "opticalphoton".<BR>
<BR>
But what do you mean "with optical photon enabled"?<BR>
<BR>
An incident gamma cannot become an optical photon.<BR>
Do you mean you enable scintillation process in crystal?<BR>
<BR>
I do not know if the latest GATE version has added an easy<BR>
way to specify scintillation process in crystal. Basically<BR>
you need to put those scintillation properties into your<BR>
material to get opticalphotons.<BR>
<BR>
hope it helps. <BR>
<BR>
Yu Chen, Ph.D.<BR>
University of Massachusetts Medical School<BR>
Division of Nuclear Medicine<BR>
55 Lake Avenue North<BR>
Worcester, MA 01655-0243<BR>
Phone: (508) 856-6123<BR>
Fax: (508) 856-4572<BR>
<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: gate-users-bounces@lists.healthgrid.org on behalf of Paola Solevi<BR>
Sent: Fri 10/13/2006 12:44 PM<BR>
To: gate-users@lists.healthgrid.org<BR>
Subject: [Gate-users] Interaction point<BR>
<BR>
Dear GATE users,<BR>
I'm gunning gamma 511 keV against a crystal (with optical enabled) and I<BR>
would like to know (or eventually to set) the position of interaction in<BR>
the crystal where the optical photons generation starts.<BR>
How can I do?<BR>
<BR>
Thanks a lot,<BR>
Paola<BR>
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