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Updated: May 8, 2026
Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
A simplified technique to determine random coincidence summing of gamma rays and dead time count loss corrections
R Shweikani1, M Hasan, M Takeyeddin
1Department of Protection and Safety, Atomic Energy Commission of Syria, Damascus PO Box 6091, Syria.
Abstract:
The loss in counts rate under the peak in gamma spectrum was studied using two techniques (complex spectrum and high active single isotope). The results showed that the loss was occurred when the integrated counting rate was more than 400 counts per second (CPS) up to 10(4)cps, for energy range 20-2,500 keV. This was mainly due to the random summing effect in the detector's volume. It was found that the probability of random summing has increased with the increase of the volume of detector's crystal. The correction factor F(Ct) for the counts rate under the peak was determined experimentally.
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