<html><head></head><body><div class="ydpe822e4d7yahoo-style-wrap" style="font-family:courier new, courier, monaco, monospace, sans-serif;font-size:13px;"><div><div dir="ltr" data-setdir="false">Hello again,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I think that for your application you should probably try Geant4, because, as the user guide states:</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><span>"In contrast with Geant4, Gate does not use isotopic abundances. This omission has little bearing on Gate applications because isotopic abundances are unimportant in low to mid energy photon and charged particle interactions. In fact, this distinction is only important for enriched or depleted materials interacting with neutrons or, high energy (>5 MeV) photons or charged particles."</span><br></div><div dir="ltr" data-setdir="false"><span><br></span></div><div dir="ltr" data-setdir="false"><span>...Or, you could modify some classes of GATE to be able and run such simulation.</span></div><div dir="ltr" data-setdir="false"><span><br></span></div><div dir="ltr" data-setdir="false"><span><br></span></div><div dir="ltr" data-setdir="false"><span>Regards,</span></div><div dir="ltr" data-setdir="false"><span>Konstantinos</span></div><div><br></div><div class="ydpe822e4d7signature"><div style="font-family:courier, monaco, monospace, sans-serif;font-size:13px;"><div style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;"><span style="font-style:italic;">-----------------------------------------------------</span></div><span style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;font-style:italic;"> Konstantinos Chatzipapas<br> Medical Physicist, </span><span style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;font-style:italic;">MSc<br></span><div style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;"><div><span style="font-style:italic;"> <span style="font-weight:bold;">University of Patras</span></span></div><div><span style="font-style:italic;"><span style="font-weight:bold;"><br></span></span></div><div dir="ltr"><span style="font-style:italic;"><span style="font-weight:bold;"> web: <a href="http://physicsfeed.blogspot.com/" rel="nofollow" target="_blank">Physics Magazine</a></span></span></div></div></div></div></div>
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Στις Δευτέρα, 5 Απριλίου 2021, 07:32:53 μ.μ. EEST, ο χρήστης APSARA TENNAKOON <apsara@connect.hku.hk> έγραψε:
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<div><div id="yiv4384573124"><div><div dir="ltr">Hello Konstantinos, <div><br clear="none"></div><div>Thank you!</div><div><br clear="none"></div><div>To test this, I have tried simulating a proton beam in a phantom made only from Heavyoxygen (Z=8, A=18 g/mole). </div><div><br clear="none"></div><div>I do not expect any 16-O in this phantom. However, from the simulation output, it seems that there are "protonInelastic" events occurring between protons and 16-O. </div><div><br clear="none"></div><div>Is it possible that GATE sees Heavyoxygen, only recognizes a Z=8 element and simulates events for all its isotopes according to their abundances?</div><div><br clear="none"></div><div>If it is pertinent, I am using physics list QGSP_BIC_HP. </div><div><div><br clear="none"></div><div>Apsara</div></div></div><br clear="none"><div class="yiv4384573124yqt4347686049" id="yiv4384573124yqt04383"><div class="yiv4384573124gmail_quote"><div class="yiv4384573124gmail_attr" dir="ltr">On Mon, Apr 5, 2021 at 2:15 PM Konstantinos P. Chatzipapas <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:konhat88@yahoo.gr" target="_blank" href="mailto:konhat88@yahoo.gr">konhat88@yahoo.gr</a>> wrote:<br clear="none"></div><blockquote class="yiv4384573124gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div><div style="font-family:courier, monaco, monospace, sans-serif;font-size:13px;"><div><div dir="ltr">Hello again,</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Your definition is correct and Heavyoxygen corresponds to 18-O. Good job.!</div><div dir="ltr"><br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Regards,</div><div dir="ltr">Konstantinos</div><div><br clear="none"></div><div><div style="font-family:courier, monaco, monospace, sans-serif;font-size:13px;"><div style="color:rgb(0,0,0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;"><span style="font-style:italic;">-----------------------------------------------------</span></div><span style="color:rgb(0,0,0);font-family:Arial;font-size:16px;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-style:italic;"> Konstantinos Chatzipapas<br clear="none"> Medical Physicist, </span><span style="color:rgb(0,0,0);font-family:Arial;font-size:16px;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-style:italic;">MSc<br clear="none"></span><div style="color:rgb(0,0,0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;"><div><span style="font-style:italic;"> <span style="font-weight:bold;">University of Patras</span></span></div><div><span style="font-style:italic;"><span style="font-weight:bold;"><br clear="none"></span></span></div><div dir="ltr"><span style="font-style:italic;"><span style="font-weight:bold;"> web: <a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="http://physicsfeed.blogspot.com/">Physics Magazine</a></span></span></div></div></div></div></div>
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Στις Κυριακή, 4 Απριλίου 2021, 08:20:40 μ.μ. EEST, ο χρήστης APSARA TENNAKOON <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:apsara@connect.hku.hk" target="_blank" href="mailto:apsara@connect.hku.hk">apsara@connect.hku.hk</a>> έγραψε:
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<div><div id="yiv4384573124gmail-m_8911609386497578942gmail-m_6624984710292416192gmail-m_-226392990628876050yiv1198808782"><div><div dir="ltr">Thank you Konstantinos,<div><br clear="none"><div>Could you help advise if GATE allows me to define<i> </i>a material containing <i>a specific isotope </i>of an element (e.g. 18-O). I am trying to simulate interactions of a proton beam in 18-O enriched water.</div><div><br clear="none"></div><div>I have tried to define a new element 'Heavyoxygen' (S = Oh) with Z = 8., A = 17.999 g/mole, and a new material Heavywater composed of H and Oh in GateMaterials.db. My concern is if GATE recognizes Oh as 18-O and knows to use the associated cross-sections for interactions with e.g. protons. </div><div><br clear="none"></div><div>Please advise. </div><div><br clear="none"></div><div>Thank you!</div><div>Apsara</div></div></div><br clear="none"><div id="yiv4384573124gmail-m_8911609386497578942gmail-m_6624984710292416192gmail-m_-226392990628876050yiv1198808782yqt06912"><div><div dir="ltr">On Sat, Apr 3, 2021 at 3:04 PM APSARA TENNAKOON <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:apsara@connect.hku.hk" target="_blank" href="mailto:apsara@connect.hku.hk">apsara@connect.hku.hk</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div dir="ltr">Thank you, Konstantinos,<br clear="none"><br clear="none">Sorry, to clarify, I am trying to define 18-O enriched water in GATE. Does GATE allow one to define an <i>isotope</i> of an element (e.g. <u>18</u>-O) - and hence 18-O water - in GateMaterials.db, and have e.g. protons interacting with it using the relevant reaction cross-sections for <u>18</u>-O? <div><br clear="none"></div><div>Thank you!</div><div><br clear="none"></div><div>Apsara Tennakoon</div></div><br clear="none"><div><div dir="ltr">On Sat, Apr 3, 2021 at 1:08 PM Konstantinos P. Chatzipapas <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:konhat88@yahoo.gr" target="_blank" href="mailto:konhat88@yahoo.gr">konhat88@yahoo.gr</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div><div style="font-family:courier, monaco, monospace, sans-serif;font-size:13px;"><div><div dir="ltr">Hello Apsara,</div><div dir="ltr"><br clear="none"></div><div dir="ltr">What exactly do you mean by enriched materials?? You can insert any kind of material in GateMaterials.db.</div><div dir="ltr"><br clear="none"></div><div dir="ltr"><a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="https://opengate.readthedocs.io/en/latest/materials.html">https://opengate.readthedocs.io/en/latest/materials.html</a><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div dir="ltr">Regards,</div><div dir="ltr">Konstantinos</div><div><br clear="none"></div><div><div style="font-family:courier, monaco, monospace, sans-serif;font-size:13px;"><div style="color:rgb(0,0,0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;"><span style="font-style:italic;">-----------------------------------------------------</span></div><span style="color:rgb(0,0,0);font-family:Arial;font-size:16px;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-style:italic;"> Konstantinos Chatzipapas<br clear="none"> Medical Physicist, </span><span style="color:rgb(0,0,0);font-family:Arial;font-size:16px;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-style:italic;">MSc<br clear="none"></span><div style="color:rgb(0,0,0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;"><div><span style="font-style:italic;"> <span style="font-weight:bold;">University of Patras</span></span></div><div><span style="font-style:italic;"><span style="font-weight:bold;"><br clear="none"></span></span></div><div dir="ltr"><span style="font-style:italic;"><span style="font-weight:bold;"> web: <a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="http://physicsfeed.blogspot.com/">Physics Magazine</a></span></span></div></div></div></div></div>
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Στις Παρασκευή, 2 Απριλίου 2021, 10:44:25 μ.μ. EEST, ο χρήστης APSARA TENNAKOON <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:apsara@connect.hku.hk" target="_blank" href="mailto:apsara@connect.hku.hk">apsara@connect.hku.hk</a>> έγραψε:
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<div><div id="yiv4384573124gmail-m_8911609386497578942gmail-m_6624984710292416192gmail-m_-226392990628876050yiv1198808782gmail-m_-3650016595843273124gmail-m_-1900201658104949184yiv2973922382"><div dir="ltr">Dear GATE users,<div><br clear="none"></div><div>Is it possible to define enriched materials in GATE? I would like to simulate a proton beam in e.g. 50% 18-O enriched water, and score proton-induced activation, to attempt to replicate the TOPAS simulations in this work: <br clear="none"></div><div><a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="https://doi.org/10.1016/j.radphyschem.2021.109385">https://doi.org/10.1016/j.radphyschem.2021.109385<br clear="none"></a></div><div><br clear="none"></div><div>Thank you!</div><div><br clear="none"></div><div>Best regards,</div><div><br clear="none"></div><div>Apsara Tennakoon</div><div>Masters student - Medical Physics</div><div>The University of Sydney</div></div>
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