Precise efficiency calibration of an HPGe detector up to 3.5 MeV, with measurements and Monte Carlo calculations

Precise efficiency calibration of an HPGe detector up to 3.5 MeV, with measurements and Monte Carlo calculations

Previously we used relative and absolute efficiency measurements combined with Monte Carlo calculations to define the efficiency of an HPGe gamma-ray detector with 0.2% accuracy from 50 to 1400 keV. This work has been extended to 4.8 MeV with measurements of relative efficiencies from 24Na, 56Co, an...

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Veröffentlicht in:Applied radiation and isotopes 2004-02, Vol.60 (2), p.173-177
Hauptverfasser: Helmer, R.G., Nica, N., Hardy, J.C., Iacob, V.E.
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Calibration
Equipment Failure Analysis
Gamma Rays
Ge detector
Germanium - radiation effects
Measurements 20–3500 keV
Models, Statistical
Monte Carlo
Monte Carlo Method
Precise efficiency
Quality Control
Radiometry - instrumentation
Radiometry - methods
Radiometry - standards
Reproducibility of Results
Sensitivity and Specificity
Transducers
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Beschreibung
Zusammenfassung:Previously we used relative and absolute efficiency measurements combined with Monte Carlo calculations to define the efficiency of an HPGe gamma-ray detector with 0.2% accuracy from 50 to 1400 keV. This work has been extended to 4.8 MeV with measurements of relative efficiencies from 24Na, 56Co, and 66Ga sources. The combined results of experiment and calculation yield an efficiency curve up to 3.5 MeV with 0.4% accuracy. Single- and double-escape peak contributions also agree with calculation if positron annihilation-in-flight is incorporated.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2003.11.012