The age of the sediment from a particular depth in the sediment column can then be inferred.If modelling and interpretation are requested, the Pb-210 results will normally be modelled to obtain the best fit of the data, where possible.Cesium-137 is used as an independent tracer to validate the Pb-210 chronology.
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However much of the cesium-137 from testing has now decayed.
The important thing to understand about such claims is what "detectable" means.
At Flett we use Lead-210(Pb-210) and Cesium-137(Cs-137) to determine the rate of sediment accumulation in lakes, oceans and other water bodies.
It is typical to analyze 10 - 20 sections of a sediment core for Pb-210 and a similar number of Cs-137, covering an accumulation period of about 160 years.
The halflife is about 30 years, so the decay runs slowly on human timescales.
Moreover, testing and accident related cesium is exceedingly wide-spread.
Furthermore, it has been shown that it is not necessary to open the bottle.
The most interesting aspect is the presence of peaks of activity, which show that the wine keeps in memory the atmospheric nuclear testing (years 1950-1963) and the accident of Chernobyl (1986), which in both cases led to the presence on French soil of measurable amounts of cesium 137.
Cleaning materials to be put in a low background neutrino detector is one thing, cleaning a vineyard is quite another.