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Applied Physics B

, Volume 44, Issue 1, pp 71–74 | Cite as

Endoergic and resonant charge transfer excitation in He-Cu discharge

  • P. Mezei
  • K. Rózsa
  • M. Jánossy
  • P. Apai
Contributed Papers

Abstract

The intensity of Cu-II lines with upper level energies near and above those of the He ion was measured as a function of He pressure in a Cu hollow cathode tube. In this tube at low pressures the negative glow could expand above the cathode. The maximum intensity of the Cu-II 493.1 nm line was found in the low voltage, high pressure hollow cathode discharge region in accordance with a resonant charge transfer excitation process. Enhancement of the intensity of the Cu-II 436.5 nm and 417.9 nm lines was observed in the cathode glow at low pressures. Excitation of these lines is attributed to endoergic charge transfer collisions between He ions accelerated by the 2 kV tube voltage and ground state Cu atoms. The cross-section for this reaction exciting the 436.5 nm line was estimated to be of the order of 10−17 cm2.

PACS

34 42.55C 52 

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • P. Mezei
    • 1
  • K. Rózsa
    • 1
  • M. Jánossy
    • 1
  • P. Apai
    • 1
  1. 1.Central Research Institute for PhysicsBudapest 114Hungary

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