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

R G Helmer; N Nica; J C Hardy; V E Iacob

doi:10.1016/j.apradiso.2003.11.012

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

Appl Radiat Isot. 2004 Feb-Apr;60(2-4):173-7. doi: 10.1016/j.apradiso.2003.11.012.

Authors

R G Helmer¹, N Nica, J C Hardy, V E Iacob

Affiliation

¹ Idaho National Engineering and Environmental Laboratory, Idaho Accelerator Center, Idaho State University, P.O. Box 1625, Pocatello, Idaho Falls, ID 83415-2114, USA. [email protected]

PMID: 14987638
DOI: 10.1016/j.apradiso.2003.11.012

Abstract

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.

Publication types

Comparative Study
Evaluation Study
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Validation Study

MeSH terms

Algorithms*
Calibration*
Equipment Failure Analysis
Gamma Rays*
Germanium / radiation effects*
Models, Statistical*
Monte Carlo Method*
Quality Control
Radiometry / instrumentation*
Radiometry / methods*
Radiometry / standards
Reproducibility of Results
Sensitivity and Specificity
Transducers

Substances

Germanium