Research output: Contribution to journal › Article › peer-review
A Semiempirical Analysis of Perturbations in the Triplet 3s, 3d Complex of Molecular Hydrogen : The Radiative Lifetimes for Rovibronic Levels of the h 3∑g+, g3∑g +, i3Πg+, and j 3Δg+ States of h2. / Astashkevich, S. A.; Lavrov, B. P.
In: Optics and Spectroscopy (English translation of Optika i Spektroskopiya), Vol. 93, No. 3, 01.09.2002, p. 380-388.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - A Semiempirical Analysis of Perturbations in the Triplet 3s, 3d Complex of Molecular Hydrogen
T2 - The Radiative Lifetimes for Rovibronic Levels of the h 3∑g+, g3∑g +, i3Πg+, and j 3Δg+ States of h2
AU - Astashkevich, S. A.
AU - Lavrov, B. P.
PY - 2002/9/1
Y1 - 2002/9/1
N2 - The dependences of the radiative lifetimes τnvNfor rovibronic levels of the h3∑g+, g 3∑g+, 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)3∑ g+, (3dσ)3∑g+, (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) 3∑u+ and (2pπ)3Π u states. We analyze the perturbations of the radiative lifetimes for rovibronic levels of the h3∑g+, g 3∑g+, i3Πg +, and j3Δg+ states in the triplet 3s, 3d complex of H2. Considerable differences (reaching a factor of 5 for h3∑g+ 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)3∑g+ state in the i 3Πg+ perturbation and by a considerable difference (reaching an order of magnitude) between the adiabatic values of τnvN for (3sσ)3∑g+ and (3dπ)3Πg+. The differences between the nonadiabatic and adiabatic lifetimes for rovibronic levels of the g 3∑g+ and j3Δ g+ states are much smaller (no more than 11%).
AB - The dependences of the radiative lifetimes τnvNfor rovibronic levels of the h3∑g+, g 3∑g+, 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)3∑ g+, (3dσ)3∑g+, (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) 3∑u+ and (2pπ)3Π u states. We analyze the perturbations of the radiative lifetimes for rovibronic levels of the h3∑g+, g 3∑g+, i3Πg +, and j3Δg+ states in the triplet 3s, 3d complex of H2. Considerable differences (reaching a factor of 5 for h3∑g+ 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)3∑g+ state in the i 3Πg+ perturbation and by a considerable difference (reaching an order of magnitude) between the adiabatic values of τnvN for (3sσ)3∑g+ and (3dπ)3Πg+. The differences between the nonadiabatic and adiabatic lifetimes for rovibronic levels of the g 3∑g+ and j3Δ g+ states are much smaller (no more than 11%).
UR - http://www.scopus.com/inward/record.url?scp=0141650608&partnerID=8YFLogxK
U2 - 10.1134/1.1509818
DO - 10.1134/1.1509818
M3 - Article
AN - SCOPUS:0141650608
VL - 93
SP - 380
EP - 388
JO - OPTICS AND SPECTROSCOPY
JF - OPTICS AND SPECTROSCOPY
SN - 0030-400X
IS - 3
ER -
ID: 33268273