Applied physics

, Volume 20, Issue 3, pp 213–217 | Cite as

Measurement of molecular hydrogen densities by resonance fluorescence

  • P. Bogen
  • Y. T. Lie
Contributed Papers


Using a pulsed capilary discharge through helium as a light source fluorescence within the Lyman bands (transitionX 1 g + B 1 u + of molecular hydrogen and deuterium has been investigated. Selecting a narrow spectral range (width ≈ 8 Å) from the continuum radiation with a spectrometer, lines in the wavelength range from 1060 Å to 1110 Å have been excited having a vibrational quantum number υ″=0 in the lower state, and ≦υ′≦4 in the upper state. The fluorescence intensity has been measured as a function of υ′ and of the hydrogen density. Agreement with calculations has been found to be within ±30%. The method at present allows the determination of densities between 1010 and 1015 molecules per cm3 with a temporal resolution of 1µs and with a spacial resolution of 0.1 cm3


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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • P. Bogen
    • 1
  • Y. T. Lie
    • 1
  1. 1.Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbHAssoziation EURATOM/KfAJülichFed. Rep. Germany

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