Measurements on a prototype segmented Clover detector

The performance of a segmented Clover germanium detector has been measured. The segmented Clover detector is a composite germanium detector, consistin g of four individual germanium crystals in the configuration of a four-leaf Clover, housed in a single cryostat. Each crystal is electrically segmente d on its outer surface into four quadrants, with separate energy read-outs from nine crystal zones. Signals are also taken from the inner contact of e ach crystal. This effectively produces a detector with 16 active elements. One of the purposes of this segmentation is to improve the overall spectral resolution when detecting gamma radiation emitted following a nuclear reac tion, by minimising Doppler broadening caused by the opening angle subtende d by each detector element. Results of the tests with sources and in beam w ill be presented. The improved granularity of the detector also leads to an improved isolated hit probability compared with an unsegmented Clover dete ctor. (C) 1999 Elsevier Science B.V. All rights reserved.