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New Method for the Production of Ions from Nonconductors for Analysis by Solid-Source Mass Spectrography

Volume 21, Number 1 (Feb. 1967) Page 28-30

Deines, P.; Eskew, T.J.; Herzog, L.F.

In recent years, the mass spectrograph has become an important tool for the chemical analysis of conductors, semiconductors, and nonconductors. Dempster first applied the radiofrequency (rf) spark to the analysis of nonconductors during the Manhattan Project of the early 1940's as a means of prospecting for uranium and its isotopes in minerals; and in the early 1950's, Hannay and Ahearn extended the technique to the analysis of semiconductors. The vacuum-vibrator source (also referred to as the dc vibrator arc) was also first used by Dempster, in the 1930's. Since 1950, its development into an analytical tool for conductors has been carried forward through the work of Preston, Herzog, Venkatasubramanian, and Schuy, among others. To the best knowledge of the authors, the vibrator has not been successfully used for the ionization and analysis of nonconducting materials until now.