Review of Scientific Instruments · 1961 · 91 citations · 6 references
Natural SciencesPhysicsMolecular PhysicsSpectroscopySurface ScienceIonization TechniquesMolecular SpectroscopyCharge Transfer EfficiencyElectron Impact CollisionsElectron Impact IonizationElectron-impact ExcitationFast Atom BombardmentHigh-intensity Beam PhysicsIonization Cross SectionsMolecular Beam Experiments
The study discusses charge‑transfer efficiency, beam‑intensity monitoring, and the apparatus’s adaptability for ionization‑cross‑section and surface‑phenomena research. The technique includes ionization by electron impact, acceleration and focusing, and neutralization by charge transfer. The apparatus produces a molecular N₂ beam spanning 5–1000 eV with a 0.5 eV energy spread, intensities from 10⁸ to 10¹⁰ molecules s⁻¹, and absolute intensity known to 20 %.
Apparatus has been developed for producing a molecular N2 beam covering the energy range 5–1000 ev. The technique includes ionization by electron impact, acceleration and focusing, and neutralization by charge transfer. Energy spread is 0.5 ev. The beam intensity ranges from 108 molecules per second at low energy to 1010 at high energy. The absolute beam intensity can be determined within 20%. Charge transfer efficiency, beam intensity monitoring, and adaptability of the apparatus to the studies of ionization cross sections and surface phenomena are discussed.
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<i>Electronic and Ionic Impact Phenomena</i>
H. S. W. Massey, E. H. S. Burhop, Philip Μ. Morse · Physics Today · 1953 · 1.3K citations
Natural Sciences, Chemistry, Physics +10