High vibrational levels of the X state of ICl, and the electronic-coriolis coupling of the X and A states

  • Brand J
  • Hoy A
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Abstract

Ro-vibrational levels of the ground state of ICl have been measured in the range vx= 35-73 and Jx< 55 using three-stage polarization-labeling spectroscopy. When merged with established microwave and fluorescence data for the lower levels, these results lead to a self-consistent set of spectroscopic constants Gv, Bv, Dvand Hvfor all levels vx≤ 73. The highest Gvand Gv+ FJterm values recorded are, respectively, 52.7 and 1.37 cm-1below the dissociation limit. Coefficients of the long-range interaction I + Cl are determined by analysis of the outer wings of the RKR potentials for the X(0+) and A′(2) states. Electronic rotational interaction between X and the well-known A(1) state of ICl is shown to account for at least a major part of the Ω-doubling splitting observed in A: the electronic matrix element characterizing this interaction is shown to be strongly r-dependent, and reasons for this are reviewed. © 1985.

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Authors

  • J. C D Brand

  • A. R. Hoy

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