1. Ab initio potential energy surfaces, bound states, and electronic spectrum of the Ar–SH complex.
- Author
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Doyle, Richard J., Hirst, David M., and Hutson, Jeremy M.
- Subjects
- *
POTENTIAL energy surfaces , *BOUND states , *QUANTUM theory , *WAVE functions , *DIPOLE moments , *PHYSICAL & theoretical chemistry , *SPECTRUM analysis - Abstract
New ab initio potential energy surfaces for the 2Π ground electronic state of the Ar–SH complex are presented, calculated at the RCCSD(T)/aug-cc-pV5Z level. Weakly bound rotation-vibration levels are calculated using coupled-channel methods that properly account for the coupling between the two electronic states. The resulting wave functions are analyzed and a new adiabatic approximation including spin-orbit coupling is proposed. The ground-state wave functions are combined with those obtained for the excited 2Σ+ state [D. M. Hirst, R. J. Doyle, and S. R. Mackenzie, Phys. Chem. Chem. Phys. 6, 5463 (2004)] to produce transition dipole moments. Modeling the transition intensities as a combination of these dipole moments and calculated lifetime values [A. B. McCoy, J. Chem. Phys. 109, 170 (1998)] leads to a good representation of the experimental fluorescence excitation spectrum [M.-C. Yang, A. P. Salzberg, B.-C. Chang, C. C. Carter, and T. A. Miller, J. Chem. Phys. 98, 4301 (1993)]. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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