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Resonance photoionisation of the metastable 21,3 S helium near then=2 andn=3 excitation thresholds of He

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Zeitschrift für Physik D Atoms, Molecules and Clusters

Abstract

Diagonalisation calculations of line profile parametersq for a few1,3 P resonances in the photoionisation of singlet and triplet metastable helium are performed near then=2 andn=3 excitation thresholds of He+. From the analysis and comparison of calculated values, the symmetric and asymmetric characters of resonance lines near then=2 andn=3 thresholds respectively are shown. In addition, near then=3 excitation threshold, a comparison is made with helium ground-state photoionisation for a few1 P resonances, together with a discussion on the character of changes occurring in the line profile parameters.

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Author notes

  1. A. Wague

    Present address: Department of Physics, Faculty of Sciences, University C.A.D. of Dakar, Dakar, Fann-Senegal

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  1. Dipartimento di Fisica, Università degli Studi di Trento, I-38050, Povo-Trento, Italia

    A. Wague

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  1. A. Wague
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Wague, A. Resonance photoionisation of the metastable 21,3 S helium near then=2 andn=3 excitation thresholds of He. Z Phys D - Atoms, Molecules and Clusters 15, 199–202 (1990). https://doi.org/10.1007/BF01437180

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  • DOI: https://doi.org/10.1007/BF01437180

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