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Some answers:
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<div>1) This is the position of the positron-electron annihilation, not the position of the interaction within the crystal. It makes sense that it occurs very near your source.</div>
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<div>2) I don't know. Singles are what you get after the digitizer processes your hits. They should be in your crystal.</div>
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<div>3) I don't know.</div>
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<div>4) The volume IDs are exactly what the name says: the ID (identification number) of the volume in which the hit (or single) occurred. Each volume in each<span style="background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 13px; line-height: 19px; "> level
of the hierarchy of the system you're using (e.g. base, rsector, module, etc.) gets a unique ID number. The volumes get numbered sequentially. If you use a cubic array repeater, then the volumes are numbered 0 to N-1 (where N is the number of volumes you have
in your array) and they increase first along the x axis, then along y, then along z. For a ring repeater, they increase in the counterclockwise direction, if I remember correctly.</span></div>
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<div>Hope this helps!<br>
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<div>Marc</div>
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<div>__________________________</div>
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<div>Marc Chamberland, MSc</div>
PhD candidate<br>
Department of Physics<br>
Carleton University<br>
Ottawa (ON)</div>
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<div>On 2012-12-07, at 5:33 AM, open researcher <<a href="mailto:openresearcher90@gmail.com">openresearcher90@gmail.com</a>></div>
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<blockquote type="cite">I want some clarifications regarding the output of Singles output -
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<div><font face="arial, sans-serif">1. What does </font><span style="font-family:sans-serif;font-size:13px;line-height:19.049999237060547px">XYZ position of the annihilation in world referential mean. (I have defined a source at 0, -22, 0 cms (and y axis is
depth axis) and a NaI crystal at -15 cm. Singles file has readings like </span><font face="sans-serif"><span style="line-height:19.045454025268555px">0.000e+00 -2.200e+02 0.000e+00</span></font><span style="font-family:sans-serif;font-size:13px;line-height:19.049999237060547px"> since
the interaction is happening in the crystal I think the y-coordinate must be -15 cm I don't know how it is showing the coordinate of the source)</span></div>
<div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><font face="sans-serif"><span style="line-height:19.045454025268555px">2.
</span></font><span style="line-height:19.049999237060547px;font-size:13px;font-family:sans-serif">XYZ position of the single in the world referential shows (0, 1, 0) for some singles, (0, 2, 0) for some and (0, 0, 0) for some singles. what can I infer from
this ?</span></div>
<div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><span style="line-height:19.045454025268555px;font-family:sans-serif">3. for some Singles time stamp is -ve (what can it mean ?)</span><br>
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<div style="font-family:arial,sans-serif;font-size:12.727272033691406px">4. what are Volume IDs ?<br>
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