Title

Calibration of well-type NaI(Tl) detector using a point sources measured out the detector well at different axial distances

Document Type

Article

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 g-ray standard point sources.

Publication Date

3-23-2015

Faculty

Faculty of Applied Health Sciences Technology

Subject Area

Physical Sciences, General Mathematics, Physics and Astronomy

Indexed in Scopus

yes

Indexed in Web Of Science

yes

DOI

https://doi.org/10.1088/1748-0221/10/03/P03022

Volume

10

Keywords

Detector modelling and simulations I (interaction of radiation with matter interaction of photons with matter interaction of hadrons with matter etc), Scintillators scintillation and light emission processes (solid gas and liquid scintillators)

eISSN

17480221

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