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Characteristics of high-rate energy spectroscopy systems using HPGe coaxial detectors and time-variant filters

Conference · · IEEE Trans. Nucl. Sci.; (United States)
OSTI ID:6853453
A high-rate, high-resolution gamma spectrometer system is described. The system consists of a reverse electrode HPGe coaxial detector, a transistor reset preamplifier, an active, semi-Gaussian prefilter, a gated integrator, and a unique data acquisition system consisting of a 10 ..mu..s, 13 bit ADC, fast FIFO memory, 8k by 23 bit data memory, and computer interface circuitry under the control of a Z-80A ..mu..P. The effects of the various components on the throughput are described and throughput data is presented. The resolution and peak shift for various shaping times are presented for count rates up to 1 Mcps input rate using a mixed /sup 22/Na and /sup 60/Co source. The low rate resolutions of /sup 57/Co and /sup 60/Co for various shaping times using either the semi-Gaussian or gated integrator output are discussed as well as the low energy resolution and peak shifts in the presence of high energy events.
Research Organization:
EG and G Ortec, 100 Midland Rd., Oak Ridge, TN 37830
OSTI ID:
6853453
Report Number(s):
CONF-831015-
Conference Information:
Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: 31:1
Country of Publication:
United States
Language:
English

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