Photoelectron spectroscopy of ClH[sub 2][sup -] and ClD[sub 2][sup -]: A probe of the Cl+H[sub 2] van der Waals well and spin–orbit excited states

Ferguson, Michael J.; Meloni, Giovanni; Gomez, Harry; Neumark, Daniel M.
November 2002
Journal of Chemical Physics;11/8/2002, Vol. 117 Issue 18, p8181
Academic Journal
Photoelectron (PE) spectra of ClH[SUP-,SUB2] and ClD[SUP-,SUB2] were measured at 299 nm (4.154 eV). Photodetachment of these anions accesses the prereactive van der Waals well on the ground state Cl+ H[SUB2] potential energy surface, as well as the low-lying spin-orbit excited states resulting from the interaction of Cl and Cl* with H[SUB2]. The PE spectra are dominated by two relatively narrow peaks corresponding to transitions to the neutral Cl·H[SUB2] and Cl*· H[SUB2] complexes. The energetics and widths of these features are interpreted in terms of the properties of the anion and neutral potential energy surfaces.


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