Alignment Effects in Optogalvanic Spectroscopy
The principles of optogalvanic spectroscopy were recalled for us by Dr. Lawler at Rottach-Egern . More recently, he has published an analysis of the mechanism for a discharge in helium . The essentials of the technique are recalled in fig. 1. The current in a gas discharge is monitored while the discharge is irradiated with light. As the frequency of the light is tuned across some characteristic frequency of the atoms of the gas, changes may be detected in the discharge current. In favourable cases these changes provide a very sensitive monitor of the resonance, so that spectra may be plotted by recording the current as a function of the frequency of the light.
KeywordsRadiative Lifetime Laser Power Density Quantum Beat Alignment Effect Hanle Effect
Unable to display preview. Download preview PDF.
- 1.J.E. Lawler: In Laser Spectroscopy IV, ed. by H. Walther, K.W. Rothe, Springer Series in Optical Sciences, Vol. 21 (Springer Berlin, Heidelberg, New York 1979 )Google Scholar
- 3.G.W. Series: Comments At. Mol. Phys. X, 199 (1981)Google Scholar
- 5.M.S. Feld, A. Sanchez, A. Javan and B.J. Feldman: ‘Spectroscopie sans largeur DopplerChwr(133)’, CNRS No.217, Paris (1974)Google Scholar
- 6.B. Decomps, M. Dumont and M. Ducloy, in Laser Spectroscopy of Atoms and Molecules, ed. by H. Walther, Topics in Applied Physics, Vol. 2 ( Springer Berlin, Heidelberg, New York 1976 )Google Scholar
- 7.Excitation Electronique d’une Vapeur Atomique’, CNRS No. 162, Paris (1976)Google Scholar
- 8.E. Biémont, N. Grevesse, P. Hannaford and R.M. Lowe, Astrophys. J., In press (1981)Google Scholar
- 9.C.E. Moore, ‘Atomic Energy Levels’, NSRDS-NBS 35 (1971)Google Scholar