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Hi GATERs,</p>
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Please, I am having some challenges here and I need help. I imported spekcalc spectrum /[keV.cm2.mAs] and got a corresponding spectrum in GATE. I, therefore, perforemd this simple calculation to validate the GATE spectrum counts with spekcalc spectrum counts.
Consider sample calculation below</p>
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SpekCalc Data</p>
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The spekcalc spectrum was converted from at 1m to 0.1m before using it as source in GATE</p>
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keV #\[keV.cm2.mAs] at 0.1m</p>
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<span style="color: rgb(255, 0, 0);">36 </span><span style="color: rgb(255, 0, 0);"> 7.6e07</span></p>
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37 8.8e07</p>
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GATE</p>
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The scoring plane in GATE was box(Air) at 0.1 from source with dimension X(cm)=1,Y(cm)=1e-5, Z(cm)=1. The Y(cm) was made smaller so that we can assume cm3=cm2.</p>
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MeV probability weighting #\[MeV.cm3.incident particle] at 0.1m</p>
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0.036 5.7e-3</p>
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0.037 6.5e-3</p>
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Converting GATE units to spekcalc units</p>
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Taking 0.036 MeV</p>
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For volume conversion cm3=cm2</p>
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For MeV to keV</p>
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I obtained 5.7e-6/[keV.cm2.incident particles]</p>
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1electron=incident particles= mAs/(6.25e15)</p>
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therefore I multipled 5.7e-6 by 6.25e15</p>
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<span style="color: rgb(255, 0, 0);">3.5812e10/[keV.cm2.mAs</span><span style="color: rgb(255, 0, 0);">]</span></p>
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I therefore compare</p>
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keV GATE Spekcalc</p>
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<span style="color: rgb(255, 0, 0);"> 36 3.5812e10/[keV.cm2.mAs</span><span style="color: rgb(255, 0, 0);">] 7.6e07[keV.cm2.mAs] </span><br>
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<span style="color: rgb(255, 0, 0);"><span style="color: rgb(0, 0, 0);">I realised GATE counts appears to higher than Spekcal counts by a factor of about 1000. My initial guess is if every thing is right I shound get the same counts in GATE. Please any help
is appreciated. Thanks.</span></span></p>
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<span style="color: rgb(255, 0, 0);"><span style="color: rgb(0, 0, 0);"><br>
</span></span></p>
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<span style="color: rgb(255, 0, 0);"><span style="color: rgb(0, 0, 0);">Best regards,</span></span></p>
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<span style="color: rgb(255, 0, 0);"><span style="color: rgb(0, 0, 0);">Emmanuel Marfo</span></span></p>
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<span style="color: rgb(255, 0, 0);"><span style="color: rgb(0, 0, 0);">University of Otago</span></span></p>
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<span style="color: rgb(255, 0, 0);"><span style="color: rgb(0, 0, 0);">Student</span></span></p>
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