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Dear Johannes,
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<div class="">I suggest to post this and similar questions in the Geant4 User Forum (<a href="https://geant4-forum.web.cern.ch/" class="">https://geant4-forum.web.cern.ch/</a> ) , instead of the GATE mailing list, for a response from more Geant4 users and developers.</div>
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<div class=""><span style="color: rgb(0, 0, 0); orphans: 2; text-align: -webkit-auto; widows: 2; -webkit-text-decorations-in-effect: none;" class="">John</span></div>
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<div class="">John Apostolakis, EP Department, CERN</div>
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<div class="">On 3 Feb 2020, at 16:13, von Vangerow Johannes <<a href="mailto:Johannes.vonVangerow@ptw.de" class="">Johannes.vonVangerow@ptw.de</a>> wrote:</div>
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Hi,<o:p class=""></o:p></div>
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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 class=""></o:p></div>
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<o:p class=""> </o:p></div>
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In a publication<span class="Apple-converted-space"> </span><a href="https://www.epj-conferences.org/articles/epjconf/pdf/2017/22/epjconf_icrs2017_06023.pdf" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">„Quantification of the validity
of simulations based on Geant4 and FLUKA for photo-nuclear interactions in the high energy range“</a><span class="Apple-converted-space"> </span>it is stated that Geant4 underestimates the Neutron production. Is this really true? I am using the QGSP_BIC_HP
physics list.<o:p class=""></o:p></div>
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Best regards<o:p class=""></o:p></div>
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Johannes<o:p class=""></o:p></div>
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<td class=""><font color="#000080" size="2" face="Calibri" class="">Dr. Johannes von Vangerow</font></td>
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<td class=""><font color="#000080" size="2" face="Calibri" class="">Software Development</font></td>
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