Abstract
Radiometric analysis of 14C by liquid scintillation counting (LSC) and gas proportional counting (GPC) are reviewed. Sample size requirements are discussed, together with the conversion of sample carbon to an appropriate product for the measurement of the beta particles emitted during 14C decay. Current instrumentation is reviewed with an emphasis on background reduction features and consequent limits of detection. In the case of LSC, background reduction features include enhanced passive shielding, anti-coincidence shielding and various forms of pulse shape analysis. For GPC, background reduction centers on passive shielding designs and anti-coincidence shielding. Age calculations are also discussed.
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