Calibration of well-type NaI(Tl) detector using a point sources measured out the detector well at different axial distances
Open Access
- 1 March 2015
- journal article
- Published by IOP Publishing in Journal of Instrumentation
- Vol. 10 (3), P03022
- https://doi.org/10.1088/1748-0221/10/03/p03022
Abstract
The high efficiency of well-type detector is one of its important advantages, when it is used to determine the low level activity of radiation in many different fields. In the present work the full-energy peak efficiency of 3"× 3" NaI(Tl) well-type scintillation detector was calculated. The calculations were based on the efficiency transfer principle and a new straightforward analytical definition to compute the effective solid angle between a point source and the detector surfaces Moreover, the effective solid angle ratio subtended by the well-type detector and a point source located out the detector cavity at various distances was calculated, the attenuation of the photon by the source-detector system [detectorendcap,deadlayer and holder material] was considered and determined. This method is easily useful in setting up the efficiency calibration curve for well-type detectors when the source is outside. The computed efficiency values are found to be in a good agreement with the experimental data obtained in the case of radiating γ -ray standard point sources.Keywords
This publication has 22 references indexed in Scilit:
- A numerical approach to calculate the full-energy peak efficiency of HPGe well-type detectors using the effective solid angle ratioJournal of Instrumentation, 2014
- An empirical formula to calculate the full energy peak efficiency of scintillation detectorsApplied Radiation and Isotopes, 2013
- Analytical approach to calculate the efficiency of 4π NaI(Tl) gamma-ray detectors for extended sourcesNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2010
- Analytical calculations of the solid angles subtended by a well-type detector at point and extended circular sourcesApplied Radiation and Isotopes, 2006
- Analytical formulae for well-type NaI (Tl) and HPGe detectors efficiency computationApplied Radiation and Isotopes, 2001
- Accurate calculation of total efficiency of Ge well-type detectors suitable for efficiency calibration using common standard sourcesNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000
- Monte Carlo calculation of the efficiency calibration curve and coincidence-summing corrections in low-level gamma-ray spectrometry using well-type HPGe detectorsApplied Radiation and Isotopes, 2000
- Well-type HPGe-detector absolute-peak-efficiency calibration and true-coincidence correctionNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1999
- Calibration of the well-type germanium gamma-ray detector employing two gamma-ray spectraNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1998
- Self-attenuation and coincidence-summing corrections calculated by Monte Carlo simulations for gamma-spectrometric measurements with well-type germanium detectorsApplied Radiation and Isotopes, 1996