Abstract
In a CW laser experiment on bound Rydberg states of barium electric-field-induced level crossings were studied. A regular type of avoided crossing of 6snf 3 F 2 and 6s (n+4)s 3 S 1 levels (n≈60,M=0) was observed under circumstances where the minimum separation was larger than the linewidth involved. This type of crossing could be reproduced using a diagonalisation procedure of the total energy matrix in the presence of the field. However, in the case of avoided crossings of the 6snf 3 F 2 and 6s(n+4)p 1 P 1 sublevels, where the minimum separation was smaller than the linewidth of the3 F 2 level, an interference-like profile was recorded. An important feature in the explanation of this interference-like profile turned out to be the broadening of the3 F 2 level by small field inhomogeneities.
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Lahaye, C.T.W., Hogervorst, W. & van der Veldt, T. Avoided level crossings in bound Rydberg states of barium in an electric field. Z Phys D - Atoms, Molecules and Clusters 13, 107–113 (1989). https://doi.org/10.1007/BF01398579
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DOI: https://doi.org/10.1007/BF01398579