The system consists of a surface barrier detector, preamplifier, amplifier, mixer router, analog to digital converter, multi-channel analyzer, and appropriate computer software.The samples are counted for periods of 0.25 to 2 days depending upon the activity of Po standard that is added to each sample also serves as an excellent internal standard to monitor the quality of the analysis.At secular equilibrium the activity of the parent isotope is equivalent to that of the daughter isotope.
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For testing Pb dating we used two routinely applied models: Constant Flux Constant Sedimentation (CFCS) and Constant Rate of Supply (CRS).
None of the models in their standard forms produced a chronology consistent with varve counts and independent chronostratigraphic markers.
Thus Goldberg (1963) developed the first principles of the 210Pb dating method, which was soon followed by a paper by Crozaz et al. Although carefully collected, accuracy cannot be guaranteed. Differing provisions from the publisher's actual policy or licence agreement may be applicable.
(1964), who examined accumulation history of Antarctic snow using 210Pb. (1972, 1973) adapted this technique to unravel sediment deposition and accumulation records in deep-sea environments.
The main application for these gamma spectrometers is for the radiometric dating of lake sediments via the measurement of 210Pb, 137Cs and 241Am.