Electron resonances associated with the Lyman system of H2 and D2
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Mcgowan, J. W.↗
Engineering topics
Mcgowan, J. W.
Publications and source records attributed to Mcgowan, J. W..
Low-energy positrons from metallic moderators in a back scattering mode.
Evaluation of preliminary results of the emission of slow (about 1 eV) positrons from solid moderators. The results presented are for copper, gold, and aluminum and were obtained using the backscatter mode of operation. Of the three metals investigated, copper is found to emit positrons with the lowest energy, while aluminum emits those with the highest energy. Several small peaks are noted on the high-energy side of the spectra, especially in the case of gold and aluminum.-
Pendyala, S.↗
Elastic and inelastic scattering of positrons in gases and solids
Three apparatuses were designed and built: The first, which is now operative, was designed to study the details of positron thermalization in solids and the subsequent emission of the low energy positrons from moderating foils; The second apparatus now under test is a positron bottle similar in design to an electron trap. It was built to store positrons at a fixed energy and to look at the number of stored positrons (storage time) as a function of a scattering gas in the vacuum chamber. The third apparatus is a crossed beam apparatus where positron-, alkali scattering will be studied. Much of the apparatus is now under test with electrons.
Mcgowan, J. W.↗
Evidence for the negative work function associated with positrons in gold.
Observation that positrons which have been thermalized in various moderators and coated with approximately 200-A gold leave the gold surface with an energy which peaks between 0.75 and 2.90 eV. This energy is thought to be associated with a positron or 'negative' work function of gold.
Costello, D. G.↗
Some three-body atomic systems
Three body atomic systems with He atom and H negative ion on basis of scattering experiments dealing with resonance and threshold behavior
Mcgowan, J. W.↗
Lyman-alpha radiation from electron collisions with simple hydrogen containing molecules.
Lyman alpha radiation from electron collisions with simple H-containing molecules, finding dissociative excitation cross section role
Mcgowan, J. W.↗
Comparison of the calculated and observed resonances in the e-H elastic-scattering channel above 10.0 ev.
Resonances in elastic cross section for electron/hydrogen atom scattering noting wide structure
Mcewen, J.↗
H/2p/ excitation resonances in /e-H/ system near threshold.
Atomic hydrogen 2p level excitation resonances from electron impact measurements
Mcgowan, J. W.↗
He sub 2 super plus in the topside ionosphere.
He ion identification problems in topside ionosphere, suggesting confirmation by N ion current modulation curves and rocket measurements of ion scale heights
Banks, P. M.↗
Lyman-alpha production and polarization in He super plus collisions with H and H sub 2.
Total Lyman alpha production cross section for positive He ion collision with atomic and molecular H, noting polarization values
Mcgowan, J. W.↗
Ionization of H /1s/ near threshold.
Electron impact ionization of H atom in 1s state near threshold, noting cross section and power law
Clarke, E. M.↗
Direct and auto-ionization of H sub 2 near threshold.
Direct and autoionization of H molecule by electron impact near threshold noting cross section, photoionization and vibrational and rotational energy changes
Clarke, E. M.↗
Lowest super 1 S and super 3 P scattering resonances in the e-H system.
Position and width of lowest elastic scattering resonances in three-body atomic system, showing resonance shape dependence upon observation angle and angular resolution
RESONANCE SCATTERING↗
Surfaces used in high resolution electron spectrometry.
Stability of various surfaces with respect to electron bombardment heating, noting influence of roughness on electron trapping
TRAPPED PARTICLE↗
Differential charge-transfer cross section for collisions of H super plus on O sub 2.
Angular distribution of fast hydrogen atoms from exothermic reaction measured for various proton energies and scattering angles
HYDROGEN ATOM↗
Angular dependence of resonance structure in atomic hydrogen.
Angular dependence of elastic scattering resonance structure in atomic hydrogen
RESONANCE SCATTERING↗