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Updated: Aug 17, 2026

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
Gamma-ray density and thickness gauges using ultra-low activity radioisotope sourcesfillin
1Division of Minerals, Commonwealth Scientific & Industrial Research Organisation (CSIRO), Private Mail Bag 5, Menai, NSW 2234, Australia. brian.sowerby@csiro.au
Abstract:
Most commercial nuclear density gauges use either (137)Cs or (60)Co sources of activity between about 185 and 1850 MBq (5 and 50 mCi). In the current work, density and thickness gauges that use ultra-low activity gamma-ray sources that are exempt from licensing requirements have been investigated. Results are reported on gauges that use a 1 MBq (22)Na source for determining slurry density in the CSIRO UltraPS slurry particle size analyser and for determining belt loading in the CSIRO on-conveyor belt microwave moisture gauge.
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