Elsevier

Chemical Physics

Volume 118, Issue 3, 15 December 1987, Pages 407-415
Chemical Physics

The endothermic excitation transfer process Kr*(3Pj) + N2(X) → Kr(1S0) + N2(C): a sensitive probe for the 3P2: 3P0 population ratio

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Abstract

The excitation transfer cross section of the Kr*-N2 system has been measured in a crossed-beam experiment in the energy range 0.5 ⩽ E(eV) ⩽ 2.7, using a mixed beam of metastable Kr* atoms. The strongly different threshold energies (0.47 and 1.12 eV for the values J = 0 and J = 2, respectively, of total electronic angular momentum of Kr*) allow for an analysis in terms of fine-structure-dependent cross sections QJ(E), resulting in Q0 (0.94 eV) = 3.38 Å2 and Q2(2.24 eV) = 2.46 Å2 at twice the threshold energy. The slightly larger cross section for J = 0 can be explained qualitatively in terms of diabatic initial- and final-state potentials, coupled by two curve crossings with the ionic Kr+-N2 Coulomb potential. The large difference with the experiments of Tabayashi and Shobatake, resulting in Q0 ≈ 10−2 Q2, is most likely due to a population ratio 3P0:3P2 = 1:146 in their atmospheric-arc beam source which is far from the assumed ratio 1:5 of statistical weights.

References (33)

  • H. Hotop et al.

    J. Electron Spectry

    (1981)
  • M.J. Verheijen et al.

    Chem. Phys.

    (1986)
  • F.T.M. van den Berg et al.

    Chem. Phys.

    (1987)
  • T.D. Nguyen et al.

    Chem. Phys.

    (1983)
  • E.J.W. van Vliembergen et al.

    Chem. Phys.

    (1987)
  • J.P.C. Kroon et al.

    Chem. Phys.

    (1984)
  • H.C.W. Beijerinck et al.

    Physica

    (1981)
  • H.C.W. Beijerinck et al.

    Chem. Phys.

    (1982)
  • H.C.W. Beijerinck et al.

    Chem. Phys.

    (1980)
  • P.J. Dagdigian and M.L. Campbell, Chem. Rev., to be...
  • H.C.W. Beijerinck

    Commun. At. Mol. Phys.

    (1987)
  • D.H. Stedman et al.

    J. Chem. Phys.

    (1970)
  • L.G. Piper et al.

    J. Chem. Phys.

    (1973)
  • R.A. Sanders et al.

    J. Chem. Phys.

    (1976)
  • T.P. Parr et al.

    J. Chem. Phys.

    (1978)
  • K. Tabayashi et al.

    J. Chem. Phys.

    (1986)
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