chlorine 36

noun

1. the radioactive isotope of chlorine having a mass number 36 and a half-life of about 440,000 years, used chiefly as a tracer.

Example Sentences

Some researchers have turned to ice core records to look for beryllium 10 and chlorine 36—two isotopes that, like radiocarbon, are produced in the atmosphere by high-energy phenomena.

From Scientific American

Ice cores allow for a similar, albeit slightly less accurate, measurement via their concentrations of beryllium 10 and chlorine 36.

From Scientific American

He knew that highly energetic cosmic-ray particles create the radioisotope chlorine 36 when they strike argon atoms in the atmosphere, and that the isotope finds its way into plants and the urine of mammals, including the pack rat.

From Time Magazine Archive

Such being the case, I can have, no doubt that, assuming hydrogen as 1, and dismissing small fractions for the simplicity of expression, the equivalent number or atomic weight of oxygen is 8, of chlorine 36, of bromine 78.4, of lead 103.5, of tin 59, &c., notwithstanding that a very high authority doubles several of these numbers.

From Project Gutenberg