By Speakman J
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Extra resources for An introduction to the electronic theory of valency
1. He discharge lamp for the production of HeI radiation (adapted from (11)). light tube and ensures that metastable (He* (2 IS, 23S» and other highly excited He atoms are effectively quenched by collisions inside the capillary. Typical operation voltage is 500 V between cathode and anode with an output of 10 10-11 11 photons· S-I. Higher members of the series He* (lsnp) are also present in the output, however, with an intensity normally less than 1 %. Positive ions which are generated in the discharge are rejected by electrodes or grids of appropriate potentials between the source and the ionization zone.
Neusser HJ (1989) Lifetimes of Energy and Angular Momentum Selected Ions. J Phys Chern 93 :3897-3907 28. Stizer S, Illenberger E, Baumgartel H (1984) Negative Ion Mass Spectra of Hexafluoro-l,3butadiene, Hexafluoro-2-butyne and Hexafluoro-cyclobutene. Identification ofthe Structural Isomers. Org Mass Spectrom 19:292-293 29. Mead RD, Stevens AE, LinebergerWC (1984) Photo detachment in Negative Ion Beams. In: Bowers MT (ed) Gas Phase Ion Chemistry, vol 3. Academic Press, New York 30. Taylor HS (1970) Models, Interpretations, and Calculations Concerning Resonant Electron Scattering Processes in Atoms and Molecules.
11. Trochoidal electron monochromator. The electrons are dispersed according to their z-velocity along the x axis. , along a plane of constant electrostatic potential. This results in a dispersion of the electrons according to their z velocity, and only those electrons which reach the exit aperture (displaced by some distance D with respect to the entrance aperture) are transmitted. These energy selected electrons are then accelerated or decelerated by subsequent electrodes before entering the reaction volume.
An introduction to the electronic theory of valency by Speakman J