Author/Authors :
Boston، نويسنده , , A.J. and Dimmock، نويسنده , , M.R. and Unsworth، نويسنده , , C. and Boston، نويسنده , , H.C. and Cooper، نويسنده , , R.J. and Grint، نويسنده , , A.N. and Harkness، نويسنده , , L.J. and Lazarus، نويسنده , , I.H. and Jones، نويسنده , , M. and Nolan، نويسنده , , P.J. and Oxley، نويسنده , , D.C. and Simpson، نويسنده , , John J. and Slee، نويسنده , , M.، نويسنده ,
Abstract :
High-resolution gamma-ray detectors based on high-purity germanium crystals (HPGe) are one of the key workhorses of experimental nuclear science. The technical development of such detector technology has been dramatic in recent years. Large volume, high-granularity, electrically segmented HPGe detectors have been realised and a methodology to improve position sensitivity using pulse-shape analysis coupled with the novel technique of gamma-ray tracking has been developed. Collaborations have been established in Europe (Advanced GAmma Tracking Array (AGATA)) [J. Simpson, Acta Phys. Pol. B 36 (2005) 1383] and the USA (GRETA/GRETINA) [C.W. Beausang, Nucl. Instr. and Meth. B 204 (2003)] to build gamma-ray tracking spectrometers. This paper discusses the performance of the first AGATA asymmetric detector that has been tested at the University of Liverpool. The use of a fully digital data acquisition system has allowed detector charge pulse shapes from a selection of well-defined photon interaction positions to be analysed, yielding important information on the position sensitivity of the detector.
Keywords :
Gamma-ray tracking , Digital acquisition , PSA , HPGe detectors , E-field simulation
