<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
</head>
<body dir="ltr">
<div id="divtagdefaultwrapper" style="font-size: 12pt; color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols;" dir="ltr">
<p>Hi GATERs,</p>
<p>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 with spekcalc. Consider sample calculation
below</p>
<p>SpekCalc Data</p>
<p>The spekcalc spectrum was converted from at 1m to 0.1m before using it as source in GATE</p>
<p>keV #\[keV.cm2.mAs] at 0.1m</p>
<p><span style="color: rgb(255, 0, 0);">36 </span><span style="color: rgb(255, 0, 0);"> 7.6e07</span></p>
<p>37 8.8e07</p>
<p><br>
</p>
<p>GATE</p>
<p>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>
<p>MeV probability weighting #\[MeV.cm3.incident particle] at 0.1m</p>
<p>0.036 5.7e-3</p>
<p>0.037 6.5e-3</p>
<p><br>
</p>
<p>Converting GATE units to spekcalc units</p>
<p>Taking 0.036 MeV</p>
<p>For volume conversion cm3=cm2</p>
<p>For MeV to keV</p>
<p>I obtained 5.7e-6/[keV.cm2.incident particles]</p>
<p>1electron=incident particles= mAs/(6.25e15)</p>
<p>therefore I multipled 5.7e-6 by 6.25e15</p>
<p><span style="color: rgb(255, 0, 0);">3.5812e10/[<span style="color: rgb(255, 0, 0);">keV.cm2.mAs</span></span><span style="color: rgb(255, 0, 0);">]</span></p>
<p>I therefore compare</p>
<p> keV GATE Spekcalc</p>
<p><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"> 36 3.5812e10/[keV.cm2.mAs</span><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);">]
<span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"> </span><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"> 7.6e07<span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);">[keV.cm2.mAs</span><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);">] </span></span></span><br>
</p>
<p><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; 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></span></p>
<p><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(0, 0, 0);"><br>
</span></span></span></p>
<p><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(0, 0, 0);">Best
regards,</span></span></span></p>
<p><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(0, 0, 0);">Emmanuel
Marfo</span></span></span></p>
<p><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(0, 0, 0);">University
of Otago</span></span></span></p>
<p><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(0, 0, 0);">Student</span></span></span></p>
<p><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px; color: rgb(255, 0, 0);"><br>
</span></span></span></p>
<p><br>
</p>
</div>
</body>
</html>