Abstract
An algorithm and a computer program implementing it are presented for calculation of the rovibronic intensities for a triatomic molecule in a "double-Renner-degenerate" electronic state. The program has been applied to investigate, by theoretical simulation, the absorption spectrum of HO(2) in the X (2)A(") and A (2)A(') electronic states. The spectrum simulations are based on potential energy functions, electric dipole moment functions, and electric dipole transition moment functions constructed from ab initio values calculated at the core-valence MR-SDCI+Q/[cc-pVQZ (H), aug-cc-pCVQZ (O)] level of theory.
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