Measuring The Performance Of The Ithemba Labs Segmented Clover Detector

The iThemba LABS segmented clover detector, capable of performing gamma-ray tracking, was characterised. The measured energy resolutions (FWHM) of this detector at 121 keV and 1332 keV are < 1.4 keV and < 2.2 keV respectively for the inner-core contacts. The photo-peak efficiency in direct and add-back modes were measured at four different distances. The detector preamplifiers are fast enough to enable time variations larger than 40 ns to be distinguished, which is sufficient for measuring variations in the signal rise time of similar to 200 ns for the iThemba LABS segmented clover detector.