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Zeitschrift für Physik A Hadrons and nuclei

, Volume 232, Issue 5, pp 462–472 | Cite as

Lifetime-measurements of alkali-molecules excited by different laserlines

  • G. Baumgartner
  • W. Demtröder
  • M. Stock
Article

Abstract

Absorbing different lines of acw-argon ion laser or a He-Ne-laser the alkali molecules Na2, K2, Rb2 and Cs2 can be pumped into different rotational-vibrational levels of an excited electronic state. The lifetimes of these states have been measured using the phase shift technique at a modulation frequency of 18 Mc/sec. Because of collisions with the always present alkali atoms the excited molecules may undergo collision-induced transitions to other states and their lifetimes are dependent on the atomic pressure. This dependence was measured and the spontaneous lifetimes were obtained by extrapolation against zero pressure. Different collision processes are discussed which compete with the unperturbed fluorescence.

Keywords

Elementary Particle Phase Shift Modulation Frequency Electronic State Excited Electronic State 

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Copyright information

© Springer-Verlag 1970

Authors and Affiliations

  • G. Baumgartner
    • 1
  • W. Demtröder
    • 1
  • M. Stock
    • 1
  1. 1.Physikalisches Institut der Universität Freiburg i. Br.Germany

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