Mark S. Brown edited Other20mmResults.tex  over 10 years ago

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\subsubsection{Other LSO:CeCa 20mm Results}  In figure \ref{fig:centroidposition-20} the same plateau as observed in the 30mm measurements is again seen. In this case the plateau is reached close to 10mm for the wrapped measurements. Again the peak to peak range in the delay peak centroid is comparable to the scintillator crystal length. We can conclude therefore that the shift is predominantly dependent upon the geometry of the scintillator crystal.In figures \ref{fig:energyresolution-20} and \ref{fig:lightoutput-20} we see the energy resolution and light output of the 20mm measurements with DOI. As expected the wrapped measurements demonstrate the poorest energy resolution and the highest light output. At low DOI the energy resolution is at its poorest and the light output is at its highest, regardless of configuration. This implies light transport through the scintillator crystal leads to losses. The unwrapped configuration shows the largest drop in light output with DOI, indicating photons are lost. Similarly in the partially wrapped configuration light is lost at increasing DOI. We conclude the predominant loss of light is scattered light leaving through the face opposite the photodetector.