Title :
A simple, powerful 4πβ/γ coincidence system
Author :
Bouchard, Jacques ; Chauvenet, Bruno
Author_Institution :
Lab. Primaire des Rayonnements Ionisants, CEA, Centre d´´Etudes Nucleaires de Saclay, Gif-sur-Yvette, France
Abstract :
A simple and powerful 4πβ/γ coincidence system which uses extendible dead-times and a common channel instead of a coincidence channel is described. All the major problems (dead-time, accidental coincidences corrections) encountered in conventional systems are eliminated. An important feature of this system is its insensitivity to the delay between beta and gamma pulses. The activity measurement of a radionuclide having a delayed state such as 85Sr (1 μs) becomes then very simple. An analog-to-digital converter (ADC) incorporated in one channel allows the recording of a complete spectrum. This instrument has been tested by the measurement of 60Co sources previously measured by another system. The result of the activity determination of a 85Sr solution is also presented
Keywords :
analogue-digital conversion; beta-ray detection; coincidence circuits; coincidence techniques; detector circuits; gamma-ray detection; nuclear electronics; 60Co sources; 85Sr; activity measurement; analog-to-digital converter; beta pulses; common channel; extendible dead-times; gamma pulses; powerful 4πβ/γ coincidence system; radionuclide; Channel capacity; Counting circuits; Delay; Event detection; Gamma ray detection; Gamma ray detectors; Jitter; Pulse measurements; Pulse shaping methods; Time measurement;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.504176
