Title :
Event Timing in High Purity Germanium Coaxial Detectors
Author :
El-Ibiary, Mohamed Yousif
Author_Institution :
School of Electrical Engineering and Computing Sciences University of Oklahoma, Norman, OK 73019
fDate :
4/1/1980 12:00:00 AM
Abstract :
The timing of gamma ray radiation in systems using high purity coaxial germanium detectors is analyzed and compared to that of systems using Ge(Li) detectors. The analysis takes into account the effect of the residual impurities on the electric field distribution, and hence on the rate of rise of the electrical pulses delivered to the timing module. Conditions under which the electric field distribution could lead to an improvement in timing performance, are identified. The results of the analysis confirm the experimental results published elsewhere and when compared with those for Ge(Li) detectors, which usually operate under conditions of charge carrier velocity saturation, confirm that high purity germanium detectors need not have inferior timing characteristics. A chart is given to provide a quantitative basis on which the trade-off between the radius of the detector and its time resolution may be made.
Keywords :
Charge carriers; Coaxial components; Equations; Event detection; Gamma ray detection; Gamma ray detectors; Germanium; Impurities; Radiation detectors; Timing;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1980.4330964