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Article | REF: P2552 V2

Radioactivity measurement using Liquid Scintillation techniques

Author: Philippe CASSETTE

Publication date: June 10, 2020

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4. Activity measurement with standard

The activity of the source to be measuredA , expressed in becquerels (Bq), is equal to the count rate delivered by the measuring device N divided by the detection efficiency R :

As detection efficiencies are generally less than unity, and vary according to measurement conditions, liquid scintillation is the most frequently used measurement method, and is relative to a standard source of the same radionuclide.

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