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Updated: Jun 17, 2026
06:57
Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
Published on: July 17, 2020
Total efficiency of GE detectors--dead layer signal effect
Pavel Dryak1, Petr Kovar, Arunas Gudelis
1Czech Metrology Institute, Prague, Czech Republic. pdryak@cmi.cz
Summary
This study compared GC 4018 and BE 5030 detectors, finding that the dead-layer signal increases total efficiency but not full-energy peak efficiency for Am-241 gamma-spectra.
Area of Science:
- Nuclear instrumentation
- Radiation detection
Background:
- The outer dead layer of semiconductor detectors can influence spectral measurements.
- Understanding dead-layer effects is crucial for accurate radiation detection.
Purpose of the Study:
- To compare the impact of dead-layer signals on two detector types (GC 4018 and BE 5030).
- To analyze the effect of dead-layer signals on gamma-spectra efficiency.
Main Methods:
- Acquisition of Am-241 gamma-spectra using GC 4018 and BE 5030 detectors.
- Utilizing coincidence measurements with an alpha liquid scintillation (LS) probe.
- Reconstruction of Am-241 spectra to evaluate efficiency changes.
Main Results:
- Coincidence spectra differed between the GC 4018 and BE 5030 detectors.
- The dead-layer signal did not enhance the full-energy peak efficiency.
- The dead-layer signal was shown to increase the total efficiency of the detectors.
Conclusions:
- Dead-layer signals impact detector efficiency differently for GC 4018 and BE 5030.
- Detector characterization must account for dead-layer contributions to total efficiency.
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