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High-Count-Rate Detectors High Count Rates with Germanium
(HPGe) Detectors in the Energy
Range Above 300 keV
The subject of high count rate spectroscopy with germanium detectors
and analog electronics is thoroughly discussed in the paper
High-Count-Rate
Spectroscopy with Ge Detectors: Quantitative Evaluation of the Performance of High-Rate
Systems.
High Count Rate in the Energy Range
30 keV to 300 keV
GLP planar detectors, 16, 25, 32, or 36 mm in diameter with appropriately
selected feedback resistors, are the instruments of choice for studying the complex gamma
spectra generated by highly enriched materials in the 80- to 200-keV region.The value of the feedback resistor (RF) for these detectors is
selected in such a way that the energy rate is maximized without a substantial degradation
of the energy resolution.
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Figure 31. Performance of
a high-counr-rate 500-mm2
active area planar HPGe detector at 122 keV.
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These detectors are typically characterized by their high-count-rate
performance at 122 keV. Figure 31 shows the performance of 500-mm2 active area
planar detectors built for these applications.
High Count Rate in the Energy Range
<30 keV
In the energy range up to 60 keV the detectors of choice are the
IGLET
and the IGLET-X. For such detectors, both at low
and at high count rates, the preamplifier of choice is the pulsed optical feedback,
POF
preamplifier . |
