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Technical Physics

, Volume 55, Issue 2, pp 264–269 | Cite as

Kinetics of luminescence induced by sputtering metallic cadmium by a pulsed fast electron beam in helium

  • A. I. MiskevichEmail author
  • Liu Tao
Optics, Quantum Electronics
  • 26 Downloads

Abstract

Results of an experimental study of the kinetics of luminescence observed when a metallic cadmium foil is bombarded in a helium medium by a 3-ns pulsed beam of 150-keV fast electrons are reported. The foil was irradiated at gas pressures from 76 to 2280 Torr. At a foil temperature of T = 240° C, the de-excitation time of the Beitler levels of the Cd II ion was measured as a function of the buffer gas pressure and the constant of collision quenching of the 5s22D5/2 level of Cd II by He atoms was determined as k ≈ 3 × 10-29 cm6/s. The experimental data were compared with calculations performed for the gas—vapor mixture in order to find the fraction of excited Cd II ions in the 5s22D5/2 state produced directly as a result of sputtering of metallic cadmium by high-energy electrons and by components of the helium plasma. At a helium buffer gas pressure of P ≤ 2.5 atm and a temperature of the cadmium target of T = 240° C, the value of this quantity was found to be α = 0.28 + 0.23P (where P is the helium pressure in atmospheres).

Keywords

Plasma Chemical Reaction Helium Pressure Pulse Electron Beam Vapor Mixture Helium Plasma 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  1. 1.National Research Nuclear University “Moscow Engineering Physics Institute,”MoscowRussia

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