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Xe nucleus does not experience any quadrupolar interactions during collisions with other atoms, and the hyperpolarization persists for long periods even after the engendering light and vapor have been removed.Spin polarization of and operates as a neutron absorber or "poison" that can slow or stop the chain reaction after a period of operation.In 1934, Edgerton was able to generate flashes as brief as one microsecond with this method. He tested the effects of varying the breathing mixtures on his subjects, and discovered that this caused the divers to perceive a change in depth.From his results, he deduced that xenon gas could serve as an anesthetic. Lazarev apparently studied xenon anesthesia in 1941, the first published report confirming xenon anesthesia was in 1946 by American medical researcher John H. Xenon was first used as a surgical anesthetic in 1951 by American anesthesiologist Stuart C.Naturally occurring xenon consists of eight stable isotopes.More than 40 unstable xenon isotopes undergo radioactive decay, and the isotope ratios of xenon are an important tool for studying the early history of the Solar System.This produces a stable, minimum energy configuration in which the outer electrons are tightly bound.It is also found as a component of gases emitted from some mineral springs.

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

The nuclear spins can be aligned beyond ordinary polarization levels by means of circularly polarized light and rubidium vapor.

The resulting spin polarization of xenon nuclei can surpass 50% of its maximum possible value, greatly exceeding the thermal equilibrium value dictated by paramagnetic statistics (typically 0.001% of the maximum value at room temperature, even in the strongest magnets).

Cullen, who successfully used it with two patients.

Xenon and the other noble gases were for a long time considered to be completely chemically inert and not able to form compounds.

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