<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"> <title></title> </head> <body text="#000000" bgcolor="#ffffff"> Hi Sang-June,<br> <br> GATE uses GEANT4's physics processes.<br> So if you call the low-energy extension you should have Doppler broadening effects<br> since according to GEANT4's manual it is accounted for E< 5 MeV.<br> Assen<br> <br> sangjune park wrote:<br> <blockquote type="cite" cite="midf16c07e0512061239l1c2bca95td75f54e40c259f32@mail.gmail.com"> <div>Dear all,</div> <div> </div> <div>The Doppler broadening effect is strongly dependent on both scattering medium and incidence particle energy.</div> <div>EGS4+KEK extension, EGSnrc, GEANT4 include Doppler broadening effect.  In the physics process of the GATE, the Compton formula is derived under the conditions that the electron is free and at rest. Therefore, it looks GATE does not include Doppler broadening.  If I am wrong, please give me information regarding how to include Doppler broadening effect in GATE simulation. </div> <div> </div> <div>Thank you for your help in advance.</div> <div>Best,</div> <div>Sang-June Park</div> <pre wrap=""> <hr width="90%" size="4"> _______________________________________________ gate-users mailing list <a class="moz-txt-link-abbreviated" href="mailto:gate-users@lphe1pet1.epfl.ch">gate-users@lphe1pet1.epfl.ch</a> <a class="moz-txt-link-freetext" href="http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users">http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users</a> </pre> </blockquote> <br> <pre class="moz-signature" cols="72">-- Assen S. Kirov, Ph.D. Assistant Attending Physicist Department of Medical Physics, Room S-1119H Memorial Sloan-Kettering Cancer Center 1275 York Avenue, New York, NY 10021 tel (212) 639-7126, fax (212) 717 3010 </pre> <P> <br> =====================================================================<br> <br> Please note that this e-mail and any files transmitted with it may be <br> privileged, confidential, and protected from disclosure under <br> applicable law. If the reader of this message is not the intended <br> recipient, or an employee or agent responsible for delivering this <br> message to the intended recipient, you are hereby notified that any <br> reading, dissemination, distribution, copying, or other use of this <br> communication or any of its attachments is strictly prohibited. If <br> you have received this communication in error, please notify the <br> sender immediately by replying to this message and deleting this <br> message, any attachments, and all copies and backups from your <br> computer.<br> </P></body> </html>