New approach to calculate the true-coincidence effect of HpGe detector

Alnour, I.A. and Wagiran, H. and Ibrahim, N. and Hamzah, S. and Siong, W.B. and Elias, M.S. (2016) New approach to calculate the true-coincidence effect of HpGe detector. International Nuclear Science, Technology And Engineering Conference 2015 (Inustec2015), 1704. ISSN 0094243X

[img]
Preview
PDF
New Approach To Calculate The True-coincidence Effect Of HpGe Detector (abstract).pdf

Download (166kB) | Preview

Abstract

The corrections for true-coincidence effects in HpGe detector are important, especially at low source-todetector distances. This work established an approach to calculate the true-coincidence effects experimentally for HpGe detectors of type Canberra GC3018 and Ortec GEM25-76-XLB-C, which are in operation at neutron activation analysis lab in Malaysian Nuclear Agency (NM). The correction for true-coincidence effects was performed close to detector at distances 2 and 5 cm using 57Co, 60Co, 133Ba and 137Cs as standard point sources. The correction factors were ranged between 0.93-1.10 at 2 cm and 0.97-1.00 at 5 cm for Canberra HpGe detector; whereas for Ortec HpGe detector ranged between 0.92-1.13 and 0.95-100 at 2 and 5 cm respectively. The change in efficiency calibration curve of the detector at 2 and 5 cm after correction was found to be less than 1%. Moreover, the polynomial parameters functions were simulated through a computer program, MATLAB in order to find an accurate fit to the experimental data points.

Item Type: Article
Uncontrolled Keywords: True-coincidence Effect, HpGe Detector, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Karen Kornalius
Date Deposited: 15 Aug 2016 23:29
Last Modified: 22 Feb 2017 08:02
URI: http://ir.unimas.my/id/eprint/13006

Actions (For repository members only: login required)

View Item View Item