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The A 1Σ u + system of Mg2

  • Horst Knöckel
  • Steffen Rühmann
  • Eberhard Tiemann
Regular Article

Abstract

The A 1 Σ u + -X 1 Σ g + UV spectrum of Mg2 has been investigated with high resolution employing Fourier-transform spectroscopy and laser excitation. Computer simulation and fit of line positions to the overlapping structures in the spectra yield precise transition frequencies. Starting with the well characterized ground state X 1 Σ g + from former work, we derived excited energy levels and report on the evaluation of the A 1 Σ u + excited state, which is found to interact with another electronic state, which we identify as the lower part of the (1)1 Π u state. A coupled channels fit to the level energies of the upper state yields a reliable potential energy curve for the A 1 Σ u + state for the range of vibrational levels 1 ≤ v′ ≤ 46. A potential energy curve for the (1)1 Π u state is proposed, but the (1)1 Π u state is only characterized by its coupling to the A state, and no direct transition to a level of the (1)1 Π u state could be uniquely identified due to the overlapping spectral structures.

Keywords

Molecular Physics and Chemical Physics 

Supplementary material

10053_2014_990_MOESM1_ESM.dat (618 kb)
Supplementary material, approximately 617 KB.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Horst Knöckel
    • 1
  • Steffen Rühmann
    • 1
  • Eberhard Tiemann
    • 1
  1. 1.QUEST and Institut für QuantenoptikLeibniz Universität HannoverHannoverGermany

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