Title :
A new pulse height analysis system based on fast ADC digitizing technique
Author :
Takahashi, Hiroyuki ; Kodama, Satoshi ; Kawarabayashi, Jun ; Iguchi, Tetsuo ; Nakazawa, Masaharu
Author_Institution :
Dept. of Nucl. Eng., Tokyo Univ., Japan
Abstract :
A fast digitizing system was used as a pulse height analysis system in nuclear spectroscopy. Input signals were processed by a computerized data processing system consisting of a fast ADC (analog-to-digital converter) of 200 MHz/10 b and a UNIX workstation without any shaping circuit. Measurements have been made with a HPGe detector and a 60Co γ-ray source. An energy resolution of 1.7 keV was obtained in this system whereas it was 2.0 keV in the conventional system with a shaping circuit with a 6-μs time constant. A digital analysis of the pulse waveform has been performed. The selection of convex waveform gives an improved peak to Compton ratio. This technique has the potential to analyze individual signals with required accuracies and to be used as an advanced signal processing method
Keywords :
Unix; analogue-digital conversion; gamma-ray detection and measurement; gamma-ray spectroscopy; nuclear electronics; physics computing; pulse height analysers; semiconductor counters; signal processing; 200 MHz; 6 mus; 60Co γ-ray source; Co; Ge; HPGe detector; UNIX workstation; advanced signal processing method; analog-to-digital converter; computerized data processing system; convex waveform; digital analysis; energy resolution; fast ADC digitizing technique; new pulse height analysis system; nuclear spectroscopy; peak to Compton ratio; pulse waveform; shaping circuit; Analog-digital conversion; Circuits; Data processing; Energy resolution; Gamma ray detection; Gamma ray detectors; Gas detectors; Signal processing; Spectroscopy; Workstations;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301252
