Abstract
The fine-structure splittings of the inverted 5 and 62 D states of potassium were measured by observing level-crossing signals at high magnetic fields. TheD levels were populated using step-wise excitations, employing two CW tunable dye lasers. For the fine-structure intervals δW we find: δW (5d)= −15,102.0 (5) MHz andδW(6d) = −7,965.8 (6) MHz. These values are about 100 times more accurate than previous results for these states. An expression is given, describing the fine-structure splittings in the sequence of potassium2D states.
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The authors are grateful for valuable discussions with Professor I. Lindgren. The help of FL S. Rydberg in the building up of the high-field atomic-beam apparatus and the cooperation with Dr. G. Belin at the early stage of the experiment is highly appreciated. Thanks are also due to Doc. A. Rosén for Hartree-Fock-Slater calculations in connection with our field-correction determinations, and to FK H. Lundberg for performing the least-square fit. This work was financially supported by the Swedish Natural Science Research Council.
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Nilsson, L., Svanberg, S. Precision determination of the fine-structure splittings of the 5d and 6d states in potassium. Z Physik A 291, 303–309 (1979). https://doi.org/10.1007/BF01408378
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DOI: https://doi.org/10.1007/BF01408378