Atomic accelerator dating

Such non-equilibrium alignment of spins is a temporary condition, and is called hyperpolarization.The process of hyperpolarizing the xenon is called optical pumping (although the process is different from pumping a laser).He inferred that this was a decay product of radioactive iodine-129.

The iodine–xenon method of dating gives the time elapsed between nucleosynthesis and the condensation of a solid object from the solar nebula. Reynolds discovered that certain meteorites contained an isotopic anomaly in the form of an overabundance of xenon-129.

By additional fractional distillation, the liquid oxygen may be enriched to contain 0.1–0.2% of a krypton/xenon mixture, which is extracted either by absorption onto silica gel or by distillation.

Finally, the krypton/xenon mixture may be separated into krypton and xenon by further distillation.

Xenon is obtained commercially as a by-product of the separation of air into oxygen and nitrogen.

After this separation, generally performed by fractional distillation in a double-column plant, the liquid oxygen produced will contain small quantities of krypton and xenon.

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