Absolute values of rovibronic transition probabilities for the I1Πg - → B1 Σu +system of bands of the H2 molecule

S. A. Astashkevich, B. P. Lavrov

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The absolute values of probabilities of the radiative I1 Πg -, ν, ′, N → B1 Σu +, ν″, N transitions of the H2 molecule are obtained for the first time for values of the vibrational quantum numbers ν′= 0-3 and ν″ = 0-9 and the rotational quantum numbers N= 2-6. The calculations are carried out using a nonadiabatic model developed in our previous papers, which takes into account the electronic-rotational interaction of the 3d1 Πg -, ν′, N and 3d1 Δg -, ν′, N levels. Semiempirical data on expansion coefficients of the total wave functions of I1 Πg -, ν′, N states in the Born-Oppenheimer basis of the 3d1 Πg -, and 3d1 Δ g - states are used. The dependence of the dipole moment of the 3d1 πg → 2p1 Σu +electronic transition on the internuclear separation r is determined both from our semiempirical data and from results of a nonempirical calculation available in the literature. It is found that the discrepancy between values of rovibronic transition probabilities, obtained on the basis of nonempirical and semiempirical data on the dipole moment of this transition, is, on the average, about 30%.

Original languageEnglish
Pages (from-to)348-355
Number of pages8
JournalOptics and Spectroscopy (English translation of Optika i Spektroskopiya)
Issue number3
StatePublished - 1 Dec 1998

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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