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Analog Plotting System For Recording Energy Spectra Of Low Energy Charged Particles, M. Eugene Rudd
Analog Plotting System For Recording Energy Spectra Of Low Energy Charged Particles, M. Eugene Rudd
M. Eugene Rudd Publications
During recent measurements of energy spectra of electrons emitted from gases under positive ion bombardment an analyzing and plotting system was developed which has some unique features. Utilizing an electrostatic analyzer, it sweeps over the desired energy range and plots a graph directly in electron volts. With suitable modifications it could also be used for positive ions. Energies from near 0 to about 1000 eV have been plotted but this range could be extended. Usable graphs have been obtained at counting rates as low as 3 counts/sec.
Compensation is provided for fluctuations in the signal due to slow or rapid …
Electron Energy Spectrum From Ar+-Ar And H+-Ar Collisions, M. Eugene Rudd, T. Jorgensen, Jr., D. J. Volz
Electron Energy Spectrum From Ar+-Ar And H+-Ar Collisions, M. Eugene Rudd, T. Jorgensen, Jr., D. J. Volz
M. Eugene Rudd Publications
Absolute differential cross sections have been measured for the ejection of electrons of various energies at 160° by argon ions and protons striking argon gas as a target. The observed energy spectrum consists of a number of "lines" or peaks superimposed on a continuous spectrum. The fine-structure regions occur below 20 eV and from about 120 to 220 eV for both projectiles. A number of lines are identified with auto-ionization transitions from neutral states and with Auger transitions from one- and two-vacancy states. With argon ions each peak has a "Doppler"-shifted counterpart due to electrons emitted from the moving particles. …
Observation Of Doppler-Shifted Peaks In The Energy Spectrum Of Autoionizatioin Electrons From Ar+ -Ar Collisions, M. Eugene Rudd, T. Jorgensen, Jr., D. J. Volz
Observation Of Doppler-Shifted Peaks In The Energy Spectrum Of Autoionizatioin Electrons From Ar+ -Ar Collisions, M. Eugene Rudd, T. Jorgensen, Jr., D. J. Volz
M. Eugene Rudd Publications
It is well known that when heavy ions traverse gas, electron pickup into excited states occurs. If the fast excited atom subsequently decays by radiating a photon, the energy of the photon will be Doppler shifted due to the motion of the source. This effect may be used to distinguish the radiation from stationary and moving atoms. For example, this method was used by Meinel to deduce the motion of solar protons streaming downward through the earth's atmosphere.
If instead the moving atom decays by autoionization, the ejected electron should also show a shift in energy analogous to the Doppler …