Deuterium

... prove useful for detecting analytes. Unfortunately, only highly specific classes of analytes (e.g., neurotransmitters, anesthetics, protons, or deuterium ions) can be detected by a change in native channel conductance. Some steps towards adapting channels for analyte detection have been taken ...

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... and neutron emission rates that have long been observed when such discharges break up. For instance, M. Rambaut’s analysis of such discharges in deuterium concludes to a medium having a fractal dimension of 1.9-1.6, with 10 3-10 4electrons in a sphere of atomic radius .53 Ã, in agreement with ...

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this is usually done using radioactive carbon, but you can do either b,c or e(use radioactive oxygen for b, deuterium for c or radioactive carbon for e)

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