|Author||Frazer, J. W. ♦ Burns, R. P. ♦ Barton, G. W.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Publisher||American Institute of Physics (AIP)|
|Subject Keyword||INSTRUMENTS ♦ BACKGROUND ♦ CARBONYLS ♦ IONIZATION ♦ IONS ♦ MASS SPECTROMETERS ♦ MEASURED VALUES ♦ POLYMERS ♦ POTASSIUM ♦ PREPARATION ♦ SENSITIVITY ♦ SOLIDS ♦ SURFACES ♦ TANTALUM ♦ TUNGSTEN ♦ VAPORS ♦ WIRES|
|Abstract||A problem encountered in high-sensitivity solidsample mass spectroscopy when using a multiple filament ionization source in the presence of a number of unusual background peaks. Investigators think that polymer ions of potassium cause the most important of these peaks. A method is described for producing tungsten filaments from which it has been possible to detect these ions. The basic method consists of decomposing tungsten hexacarbonyl vapor on a tantalum blank at a temperature high enough to vaporize the tantalum backing from the deposited tungsten. Tungsten filaments containing less than 20% residual tantalum are produced by this means. (A.C.)|
|Learning Resource Type||Article|
|Publisher Department||Univ. of California, Livermore|
|Journal||Review of Scientific Instruments|
|Organization||Univ. of California, Livermore|
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