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Absorption spectra of Na atoms in dense He

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Abstract

We present an analysis of Na-He collisional profiles at high density and very low temperature in a unified line shape semi-classical theory which contains the impact as well the quasistatic limits. Clearly understanding the variation of shape of the two fine-structure components of the 3s−3p line with increasing helium density allows us to understand experimental spectra of a Na atom attached to He nanodroplets. We compare our collisional approach to path integral Monte Carlo calculations using the same ab initio Na-He molecular potentials.

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Author information

Authors and Affiliations

  1. Observatoire de Paris, GEPI, UMR 8111, CNRS, 61 avenue de l’Observatoire, 75014, Paris, France

    Nicole F. Allard

  2. Institut d’Astrophysique de Paris, UMR 7095, CNRS, Université Paris VI, 75014, Paris, France

    Nicole F. Allard

  3. Division of Chemistry, Graduate School of Science, Hokkaido University, 060-0810, Sapporo, Japan

    Akira Nakayama

  4. Laboratoire de Chimie et Physique Quantique, Université de Toulouse (UPS) and CNRS, 118 route de Narbonne, 31400, Toulouse, France

    Fernand Spiegelman

  5. Department of Physics and Astronomy, University of Louisville, Louisville, 40292, Kentucky, USA

    John F. Kielkopf

  6. Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, 76104, Freiburg, Germany

    Frank Stienkemeier

Authors
  1. Nicole F. Allard
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  2. Akira Nakayama
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  3. Fernand Spiegelman
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  4. John F. Kielkopf
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  5. Frank Stienkemeier
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Correspondence to Nicole F. Allard.

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Allard, N.F., Nakayama, A., Spiegelman, F. et al. Absorption spectra of Na atoms in dense He. Eur. Phys. J. D 67, 52 (2013). https://doi.org/10.1140/epjd/e2013-30523-x

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  • DOI: https://doi.org/10.1140/epjd/e2013-30523-x

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