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19 October 1999 Recent developments in HPGe material and detectors for gamma-ray spectroscopy
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This paper describes recent advances in radiation-detection grade high purity germanium (HPGe) crystal growth technology and some of the recent significant developments in HPGe detectors for gamma-ray spectroscopy. These important developments were necessary to support the recent increases in the applications, uses and requirements for germanium detectors. Crystal characteristics and the performance of some devices are presented including the developmental work on large coaxial-geometry detectors as a single element, dual element and multi-element closely packed arrays. Also some of the applications of such detectors along with their resulting performance are discussed. Recent development work on monolithic segmentation of large high purity germanium crystals is presented. These detectors are high efficiency, high resolution devices for providing both position and energy information of incident high energy photons. Monolithic segmentation structure of large germanium detector improves energy resolving power by reducing the Doppler broadening effect associated with gamma rays emitted from nuclei moving at high velocity without sacrificing device efficiency. Segmentation provides a powerful tool for doing gamma-ray tracking along with pulse shape analysis, low energy filtration, and low energy background rejection, etc. This paper also reports on a revolutionary monolithic structure which is believed to be the first ever fabricated on large HPGe crystal. Discussions concerning the significance and advantages of this structure along with performance test results of the device are presented.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Pat Sangsingkeow "Recent developments in HPGe material and detectors for gamma-ray spectroscopy", Proc. SPIE 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics, (19 October 1999); doi: 10.1117/12.366584;

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