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Improved molecular constants for the \(\) and \(\) states of NaH

  • F.P. Pesl
  • S. Lutz
  • K. Bergmann

Abstract:

Improved molecular constants for the \(\) and \(\) states of the NaH molecule are presented. NaH molecules are produced by reactive scattering of H and Na2 in a crossed beam experiment. High vibrational levels (6 \(\) 9) of the NaH molecules are predominantly populated. Their excitation spectrum in the range \(\) has been measured using a new variant of Doppler spectroscopy. The transition frequencies involving the vibrational levels 2 \(\) 8 in the \(\) and 6 \(\) 9 in the \(\) state have been determined with an accuracy of better than \(\). Using also previously published data a new set of molecular constants for the \(\) and \(\) state is derived. In particular, the vibrational dependence of the rotational constants B, D and H as well as some of v”-v' band origins for \(\)and \(\) is determined. The transition frequencies measured here or published previously are reproduced by these new coefficients with an accuracy of \(\) 0.1 cm-1 [rms value] with a maximum deviation of 0.4 cm-1. New RKR potential energy curves have been calculated up to the turning points of the levels v” = 9 in the \(\) state and v' = 25 in the \(\) state.

PACS. 33.15.Mt Rotation, vibration, and vibration-rotation constants - 33.20.Kf Visible spectra 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2000

Authors and Affiliations

  • F.P. Pesl
    • 1
  • S. Lutz
    • 1
  • K. Bergmann
    • 1
  1. 1.Fachbereich Physik, Universität Kaiserslautern, 67663 Kaiserslautern, GermanyDE

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