Abstract
The use of liquid scintillation counting techniques for the in-situ measurement of quencher concentration in studies of transport phenomena was investigated. Quencher concentration gradients cause complex distortions of the measured scintillation pulse height spectrum. The measurement of the average quencher concentration using either sample channels ratio (SCR) or external standard channels ratio (ESCR) calibrations is unreliable if gradients are present, whereas measurement of the sample activity appears to remain unaffected by such gradients. It is suggested that case-specific test measurements be made on heterogeneous samples prior to the use of scintillation methods for in-situ measurement of quencher concentration.
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Schedule a callMore From: International Journal of Radiation Applications & Instrumentation. Part A, Applied Radiation & Isotopes
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