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</o:shapelayout></xml><![endif]--></head><body lang=DE-CH link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear all,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>for a proton therapy simulation we are investigating the impact of several lists and parameters on our pencil beams. We would in particular like to use a physics list with high precision on low-energy neutrons (like QGSP_BIC_HP), but at the same time we have observed that this list uses the EMoption = 0 (i.e. the settings of the emstandard EM physics list). We would instead like to use a more “mixed approach”, either using the settings of emstandandard_opt3 physics list, or those of empenelope. Is there a way to do it using the physics list builders? Or would any command /gate/physics/addPhysicsList overwrite the settings of a previous command of the similar kind?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thank you<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Yours faithfully<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Serena<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:DE-CH'>__________________________________________<br>PSI - Paul Scherrer Institut <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:DE-CH'>Mrs. Dr. Serena Psoroulas<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:DE-CH'>Scientific officer – Beam technologies development<br><br><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:DE-CH'>Centre for Proton Therapy<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:DE-CH'>WMSA/C13<br>5232 Villigen PSI<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:DE-CH'>Switzerland<br><br>Phone +41 56 310 56 79 <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:DE-CH'>serena.psoroulas@psi.ch</span><span style='mso-fareast-language:DE-CH'><o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:DE-CH'><a href="http://p-therapie.web.psi.ch/">p-therapie.web.psi.ch</a><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>