Abstract
The article presents results of experimental and theoretical analysis of the T-shaped and linear HeICl van der Waals complexes in the valence A1 and ion-pair β1 states as well as the HeICl(A1,vA ,nA ←X0+ ,vX =0,nx and β1,vβ ,nβ ←A1,vA ,nA ) optical transitions (ni are quantum numbers of the vdW) modes). The HeICl(β1,vβ ,nβ )→He+ICl(E0+ , , β1) decay are also studied. Luminescence spectra of the HeICl(β1,vβ =0-3,nβ ) complex electronic (ICl(E0+ ,vE , ) and vibrational ICl(β1,vβ ) predissociation products are measured, and branching ratios of decay channels are determined. To construct potential energy surfaces for the HeICl(A1, β1) states, we utilized the intermolecular diatomic-in-molecule perturbation theory first order method. Experimental and calculated spectroscopic characteristics of the A1 and β1 states agree well. Comparison of the experimental and calculated pump-probe, action and excitation spectra shows that the calculated spectra describe the experimental spectra adequately.
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