Electron Impact Ionization Cross Sections.
Annual progress rept. 1 Aug 67-1 Aug 68,
MASSACHUSETTS INST OF TECH CAMBRIDGE PARTICLE OPTICS LAB
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A literature survey reveals that no measurements of carbon electron ionization cross sections appear to have been made. The problem is complicated because of the large variety of possible reactions. The method describing how different processes can be separated is contained herein. The results show that some of the simpler cross sections can be deduced. Electron beam profiles, secondary electrons, and ion energy effect on the mass spectrometer were investigated in order to reduce uncertainties. A new cross section measuring technique, the Exponential Depletion Method, was developed, and is described herein. Apparatus for the existing MCB method was modified to accommodate the Exponential Depletion theory.
- Atomic and Molecular Physics and Spectroscopy