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definition | Measure of radioactivity. The number of gamma-ray photons  recorded by a gamma-ray detector in a particular energy window over a period of 1 minute. Specific energy windows are used for measuring the | ||||||
scope note | Measure of radioactivity. The number of gamma-ray photons  recorded by a gamma-ray detector in a particular energy window over a period of 1 minute. Specific energy windows are used for measuring the activity due to each of potassium, uranium and thorium. A total count window is used to measure the total activity. | ||||||
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top concept of | uom original |