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

fYear

1992

fDate

25-31 Oct 1992

Firstpage

350

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/NSSMIC.1992.301252

Filename

301252