There are additional benefits in terms of non destructive sample preparation and simultaneous assay for other environmentally significant gamma-emitting radioisotopes (e.g.
We use a pair of Geranium Gamma Detectors to measure the levels of the Cs-137 and Pb-210 isotopes in cores.
We generate a plot that helps us identify age estimates based on amounts of our trace isotopes.
Particles emitted at these two energies can be identified using an alpha spectroscopy system.
The system consists of a surface barrier detector, preamplifier, amplifier, mixer router, analog to digital converter, multi-channel analyzer, and appropriate computer software.
The presence of Cs-137 preserved in the sediments is associated with nuclear weapon testing, and its initiation is interpreted to correspond to around 1954.
We use the peak trace of Cs-137 to determine the stratigraphic interval that was deposited in 1954.
We sample the mud by coring and collecting through it, then run dried and crushed mud samples through the Gemanium Gamma Detector to measure Cs-137 and Pb-210 levels.