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<p><span style="color: rgb(0, 111, 201); font-family: Calibri, Helvetica, sans-serif; font-size: 16px;"> i am trying to calculate the energy spectrum of <span style="color: rgb(0, 111, 201); font-family: Calibri, Helvetica, sans-serif; font-size: 16px;"> </span><span style="color: rgb(0, 111, 201); font-family: Calibri, Helvetica, sans-serif; font-size: 16px;">bremshterlung
x ray </span> around a nano particle. as you can see in figure, any photons are not produced around nano particles and <span style="color: rgb(0, 111, 201); font-family: Calibri, Helvetica, sans-serif; font-size: 16px;">the </span><span style="color: rgb(0, 111, 201); font-family: Calibri, Helvetica, sans-serif; font-size: 16px;">energy
spectrum of </span><span style="color: rgb(0, 111, 201); font-family: Calibri, Helvetica, sans-serif; font-size: 16px;"> </span><span style="color: rgb(0, 111, 201); font-family: Calibri, Helvetica, sans-serif; font-size: 16px;">bremshterlung x ray is zero.</span></span></p>
<p><span style="color: rgb(0, 111, 201); font-family: Calibri, Helvetica, sans-serif; font-size: 16px;"><br>
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<p> Do anyone else know what is the problem???<br>
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<div>#### geometry</div>
<div># World</div>
<div>/gate/world/geometry/setXLength 1 cm</div>
<div>/gate/world/geometry/setYLength 1 cm</div>
<div>/gate/world/geometry/setZLength 1 cm</div>
<div>/gate/world/setMaterial G4_WATER</div>
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<div> </div>
<div>############au nanoparticle</div>
<div>/gate/world/daughters/name Au_nanoparticle</div>
<div>/gate/world/daughters/insert sphere</div>
<div>/gate/Au_nanoparticle/placement/setTranslation 0 0 0 cm</div>
<div>/gate/Au_nanoparticle/geometry/setRmax 5 nm</div>
<div>/gate/Au_nanoparticle/setMaterial gold</div>
<div>/gate/Au_nanoparticle/vis/forceSolid</div>
<div>/gate/Au_nanoparticle/vis/setColor red</div>
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<p></p>
<div>#####physics</div>
<div>/gate/physics/addPhysicsList emDNAphysics</div>
<p></p>
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<div>/gate/actor/addActor EnergySpectrumActor spectrumm</div>
<div>/gate/actor/spectrumm/attachTo volumedosimetryone</div>
<div>/gate/actor/spectrumm/save ./spectrum_result/volumedosimetrygamma.root</div>
<div>/gate/actor/spectrumm/addFilter particleFilter</div>
<div>/gate/actor/spectrumm/particleFilter/addParticle gamma</div>
<div>/gate/actor/spectrumm/addFilter IDFilter</div>
<div>/gate/actor/spectrumm/IDFilter/selectID 2</div>
<div>/gate/actor/spectrumm/energySpectrum/setEmin 0 eV</div>
<div>/gate/actor/spectrumm/energySpectrum/setEmax 0.1 keV</div>
<div>/gate/actor/spectrumm/energySpectrum/setNumberOfBins 100</div>
<div>/gate/actor/spectrumm/energyLossHisto/setEmin 0 eV</div>
<div>/gate/actor/spectrumm/energyLossHisto/setEmax 0.1 keV</div>
<div>/gate/actor/spectrumm/energyLossHisto/setNumberOfBins 100</div>
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<p>thanks</p>
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<p class="MsoNormal" dir="LTR" style="direction:ltr; unicode-bidi:embed"><sub><span style="font-size:12pt">asra sadat talebi</span></sub><br>
<span style="font-size:12pt">PhD Scholar</span><br>
<span style="font-size:12pt">Tarbiat Modares University</span><br>
<span style="font-size:12pt">Department of medical physics</span><br>
<span style="font-size:12pt">Tehran - Iran</span><br>
<span style="font-size:12pt">E-mail address: </span><span style="color:rgb(0,111,201); font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:12pt">asra.talebi@modares.ac.ir</span></p>
<span style="font-size:12pt"></span>
<p class="MsoNormal" dir="LTR" style="direction:ltr; unicode-bidi:embed"><span style="color:rgb(0,111,201); font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:16px"><span style="color:rgb(0,111,201); font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:12pt">asra.talebi@yahoo.com</span><br>
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