Accession Number : AD0428995

Title :   STUDIES IN SOLID STATE MASS SPECTROMETRY.

Descriptive Note : Rept. for 1 July 62-1 July 63,

Corporate Author : MONSANTO RESEARCH CORP DAYTON OHIO

Personal Author(s) : Hodgson,F. N. ; Katon,J. E.

Report Date : DEC 1963

Pagination or Media Count : 23

Abstract : Molecular carbon species present in the vacuum spark of the mass spectrograph were studied for various forms of carbon. Included in the study were graphite, diamond, amorphous carbon and carbides. Each form shows a unique carbon association pattern with groups of carbon atoms appearing only to C(8) or C(9) for amorphous carbon as compared to C(28) for graphite and to C(24) in earlier data on fused aromatic structures. Special techniques were developed to run volatile samples, to ionize gases in the spark source and to produce a mass reference plate based on spark spectra containing combinations of carbon (At. Wt. 12.000) and hydrogen (At. Wt. 1.0078). Kodak SWR photographic plates were investigated and found satisfactory for special applications. A method for quantitative impurities analysis is outlined and is illustrated by a determination of oxygen in beryllium. Results are compared with data from various techniques performed in other laboratories. The present state of performance of the gas inlet and Knudsen cell sources is discussed. (Author)

Descriptors :   (*MASS SPECTROSCOPY, SOLID STATE PHYSICS), (*SOLID STATE PHYSICS, MASS SPECTROSCOPY), MASS SPECTROSCOPY, CARBON, MOLECULES, SPARKS, GRAPHITE, DIAMONDS, CARBIDES, ATOMS, EXPERIMENTAL DATA, GAS IONIZATION, HYDROGEN

Distribution Statement : APPROVED FOR PUBLIC RELEASE