Abstract

The dynamics of the I{sub 2} geminate (original partner) recombination reaction in liquid Xe are examined as a function of solvent density and temperature through picosecond transient absorption spectroscopy. Specifically, the vibrational relaxation of I{sub 2} on its ground state potential surface and the nonradiative curve crossing of molecules originally recombining on the A{prime} state to the ground state are studied. The experiments are performed at 280 K over a range of Xe densities which span the entire liquid phase portion of the Xe phase diagram. The temperature dependence of the dynamics is determined between 253 and 323 K at constant Xe density. Solvent density effects on the ground state absorption coefficients are calculated. 80 refs., 27 figs., 9 tabs.

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