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Typical sample size requirements are discussed, together with the conversion of sample carbon to an appropriate product for the measurement of the β-particles emitted during , which is the most commonly used.
Current instrumentation is reviewed with an emphasis on background reduction features and consequent limits of detection.
Since the flood was accompanied by much volcanism (see Noah's Flood…, How did animals get from the Ark to isolated places? ), fossils formed in the early post-flood period would give radiocarbon ages older than they really are.In the case of LSC, the background reduction features include enhanced passive shielding, anticoincidence (active) shielding, and various forms of pulse-shape analysis.For GPC, background reduction centers on passive shielding designs and anticoincidence shielding.Furthermore, different types of plants discriminate differently.
This also has to be corrected for. Second, the ratio of C in the atmosphere at that time to be estimated, and so partial calibration of the “clock” is possible.
Carbon has unique properties that are essential for life on Earth.