Journal
JOURNAL OF COMPUTATIONAL CHEMISTRY
Volume 34, Issue 24, Pages 2091-2099Publisher
WILEY-BLACKWELL
DOI: 10.1002/jcc.23363
Keywords
diabatic potentials; dipole moments; ionic limit; pseudopotential; correlation; full valence CI approach; radiative lifetime
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Funding
- NCATS NIH HHS [UL1 TR000077] Funding Source: Medline
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For all states dissociating below the ionic limit Li-Rb+, we perform a diabatic study for (1)Sigma(+) electronic states dissociating into Rb (5s, 5p, 4d, 6s, 6p, 5d, 7s, 4f) - Li (2s, 2p, 3s). Furthermore, we present the diabatic results for the 1-11 (3)sigma, 1-8 (1,3)Pi, and 1-4 (1,3)Delta states. The present calculations on the RbLi molecule are complementary to previous theoretical work on this system, including recently observed electronic states that had not been calculated previously. The calculations rely on ab-initio pseudopotential, core polarization potential operators for the core-valence correlation and full valence configuration interaction approaches, combined to an efficient diabatization procedure. For the low-lying states, diabatic potentials and permanent dipole moments are analyzed, revealing the strong imprint of the ionic state in the (1)Sigma(+) adiabatic states. The transition dipole moment is used to evaluate the radiative lifetimes of the vibrational levels trapped in the 2 (1)Sigma(-) excited states for the first time. In addition to the bound-bound contribution, the bound-free term has been evaluated using the Franck-Condon approximation and also exactly added to the total radiative lifetime. (C) 2013 Wiley Periodicals, Inc.
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