The valueless powder absorbed the radium emanations and thus produced a glow that could continue for months or years.

In 1931-32 he worked on radium emanations for the Dublin hospitals under a Fitzgerald Research Scholarship.

These units were powered using tubes of 'radium emanation', a colorless, radioactive gas given off by radium, later identified as radon.

This radioactivity is due to the presence of radium emanation produced by the radium that is present in the ground through which the waters flow.

Radium emanation was also passed into glass or metal tubes or flat glass-tight applicators and applied in the same way as radium tubes.

Dorn called the radioactive gaseous product from radium simply "emanation", but in 1904 Rutherford introduced the name "radium emanation" for the same material.

As with radium emanation, solutions of free radium salts were also placed in tubes; in this case, the tubes were made from platinum.

It was also a method of applying radium emanation to a specially designed applicator constructed to suit the needs of the patient, who could later take it home.

Radium emanation activators, apparatuses that would apply radium emanation to water, started being produced and marketed.

In 1915, Curie produced hollow needles containing 'radium emanation', a colorless, radioactive gas given off by radium, later identified as radon, to be used for sterilizing infected tissue.

Different methods of applying radium had been tested, which fell into two categories: the use of radium emanation (now referred to as radon), and the use of radium salts.

Another unit of radioactivity is the curie, Ci, which was originally defined as the amount of radium emanation (radon-222) in equilibrium with one gram of pure radium, isotope Ra-226.

I have been investigating the gamma rays emitted by the substance usually known as Radium C., a product of Radium emanation, and in doing so I have come across some very interesting magnetical phenomena.

As a result of their work the remarkable researches of Dr Whytlaw Gray and Sir William Ramsay on the direct estimation of the density of the Radium emanation was made possible.

Radon was first identified in 1898 by Friedrich Ernst Dorn, and was named radium emanation, but was not considered a noble gas until 1904 when its characteristics were found to be similar to those of other noble gases.