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High resolution spectroscopy of prompt and metastable decaying levels in highly ionized argon, especially of the metastable3 P 2-state of Ar16+ and the4 P 5/2-state of Ar15+

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

Besides the prompt x-ray emission of Ar-ions, the metastable decay of the heliumlike3 P 2- and the lithiumlike4 P 5/2-levels of highly ionized Ar16+ and Ar15+ atoms has been observed in a foil-excited beam using a flat-crystal spectrometer. Due to the highx-ray energy resolution of the spectrometer the two3 P 2 →1 S 0 and4 P 5/2 →2 S 1/2 transitions could be resolved. The experiment yielded (3128 ±2) eV for the3P2 → and (3091 ± 2)eV for the4 P 5/2 →2 S 1/2 transition energy respectively. Using a time of flight technique the lifetimes of the3 P 2- and the4 P 5/2-states were determined to be (1.44 ±0.09)ns and (0.66 ± 0.05) ns.

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Authors and Affiliations

  1. Gesellschaft für Schwerionenforschung, Darmstadt, Germany

    H. -D. Dohmann, D. Liesen & H. Pfeng

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  1. H. -D. Dohmann
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  2. D. Liesen
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  3. H. Pfeng
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We thank Prof. Ch. Schmelzer, Prof. P. Armbruster, Dr. B. Franzke, Prof. J.R. Macdonald, Dr. R. Spohr and H.F. Beyer for helpful discussions. Engeneering work was provided by W. Bourgeois. The electronics was built by H. Reining. Without their help this experiment could not have been realized. Special thanks also to W. Erb for assistance during the measurements.

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Dohmann, H.D., Liesen, D. & Pfeng, H. High resolution spectroscopy of prompt and metastable decaying levels in highly ionized argon, especially of the metastable3 P 2-state of Ar16+ and the4 P 5/2-state of Ar15+ . Z Physik A 285, 171–176 (1978). https://doi.org/10.1007/BF01408743

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  • DOI: https://doi.org/10.1007/BF01408743

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