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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am just starting to perform simulations in Gate including Neutrons. Concerning that, I performed a simulation with 15MeV photons impinging on a thin (10µm) target. The simulation in Gate / Geant4 yields about a factor 3 less neutrons
than a simple calculation using the respective crosssection. So far I tested W and Pb.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In a publication <a href="https://www.epj-conferences.org/articles/epjconf/pdf/2017/22/epjconf_icrs2017_06023.pdf">
„Quantification of the validity of simulations based on Geant4 and FLUKA for photo-nuclear interactions in the high energy range“</a> it is stated that Geant4 underestimates the Neutron production. Is this really true? I am using the QGSP_BIC_HP physics list.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Johannes<o:p></o:p></p>
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<font style="BORDER-TOP-COLOR: ; BORDER-BOTTOM-COLOR: ; BORDER-RIGHT-COLOR: ; BORDER-LEFT-COLOR: " color="#000080" size="2" face="Calibri">Dr. Johannes von Vangerow</font></td>
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<font style="BORDER-TOP-COLOR: ; BORDER-BOTTOM-COLOR: ; BORDER-RIGHT-COLOR: ; BORDER-LEFT-COLOR: " color="#000080" size="2" face="Calibri">Phone: +49 761 49055-367</font></td>
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