Summarize the differences between 14C dating using the conventional technique (?

Question

Summarize the differences between 14C dating using the conventional technique (?-counting) and AMS, indicating: • materials which can be dated • collection & lab protocols • range of dating (ka) • possible problems • advantages and disadvantages of each Summarize the differences between 14C dating using the conventional technique (?-counting) and AMS, indicating: • materials which can be dated • collection & lab protocols • range of dating (ka) • possible problems • advantages and disadvantages of each Summarize the differences between 14C dating using the conventional technique (?-counting) and AMS, indicating: • materials which can be dated • collection & lab protocols • range of dating (ka) • possible problems • advantages and disadvantages of each

Explanation / Answer

Radiocarbon dating can be achieved by two ways – beta counting and Accelerator Mass Spectrometry (AMS). AMS is the modern technique.

Beta particles are emitted during radiocarbon decay. Counting those beta particles, emitted by a given sample, is used in Gas proportional counting and liquid scintillation techniques. These two are conventional radiometric dating. In the first method, the samples are first converted to carbon dioxide gas, and then measurements are taken in gas proportional counters. While in the latter, the sample is taken to as liquid form and a scintillator is added. The scintillator produces a flash of light, when it interacts with the beta particles, emitted from the sample.

AMS is a modern radiocarbon dating. In this method, carbon14 is directly measured relative to the C12 and C13 present in the sample. As this method does not count beta particles, but the number of carbon atoms and also the proportion of the radiogenic and non – radiogenic isotopes, it is the most efficient radiocarbon dating.

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