A Semiempirical Analysis of Perturbations in the Triplet 3s, 3d Complex of Molecular Hydrogen: The Radiative Lifetimes for Rovibronic Levels of the h 3g+, g3g +, i3Πg+, and j 3Δg+ States of h2

S. A. Astashkevich, B. P. Lavrov

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

2 Цитирования (Scopus)

Аннотация

The dependences of the radiative lifetimes τnvNfor rovibronic levels of the h3g+, g 3g+, i3Πg +, and j3Δg+ states on the vibrational, v, and rotational, N, quantum numbers (v = 0-3 and N = 1-6) of H2 have been derived for the first time. We calculated the absolute values of τnvN in terms of a nonadiabatic model that incorporates the interaction between the (3sσ)3g+, (3dσ)3g+, (3dπ)3Πg+, and (3dδ) 3Δg+ states by using our semiempirical expansion coefficients for the wave functions in the Born-Oppenheimer basis and the dipole moments for electronic transitions to the (2pσ) 3u+ and (2pπ)3Π u states. We analyze the perturbations of the radiative lifetimes for rovibronic levels of the h3g+, g 3g+, i3Πg +, and j3Δg+ states in the triplet 3s, 3d complex of H2. Considerable differences (reaching a factor of 5 for h3g+ and a factor of 2 for i3πg+) were found between the nonadiabatic and adiabatic radiative lifetimes of rovibronic levels. These differences can be explained both by a significant effect of the (3sσ)3g+ state in the i 3Πg+ perturbation and by a considerable difference (reaching an order of magnitude) between the adiabatic values of τnvN for (3sσ)3g+ and (3dπ)3Πg+. The differences between the nonadiabatic and adiabatic lifetimes for rovibronic levels of the g 3g+ and j3Δ g+ states are much smaller (no more than 11%).

Язык оригиналаанглийский
Страницы (с-по)380-388
Число страниц9
ЖурналOptics and Spectroscopy (English translation of Optika i Spektroskopiya)
Том93
Номер выпуска3
DOI
СостояниеОпубликовано - 1 сен 2002

Предметные области Scopus

  • Электроника, оптика и магнитные материалы
  • Атомная и молекулярная физика и оптика

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