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This study investigates the dynamics of iodine molecules (I2) in argon clusters using pump-probe laser techniques. The pump laser varies from 480 to 700 nm, while the probe predominantly operates at 307 nm, capturing laser-induced fluorescence peaks at 400 nm and 342 nm. The research highlights distinct behaviors of bound B-state and dissociative A-state dynamics, including predissociation and geminate recombination. Both pathways eventually transition to the A state, demonstrating lifetimes ranging from microseconds to potentially milliseconds. Key findings are reported from JK Wang et al. (1995).
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I2 in Argon Clusters Pump: varied from 480-700 nm Probe: mostly 307 nm Laser induced fluorescence: monitored peak at 400 nm and 342 nm
Gas Phase I2 I2 in Ar clusters probe pump
Dissociative A-state behavior (note bare I2 still B-state behavior) Geminate recombination Dissociative A state
Long time-scale behavior B state B-state excitation predissociation Geminate recombination A state
A-state vs B-state dynamics Both pathways end up on A state, with lifetimes of micro- to maybe milli- seconds
Figures are from: JK Wang, Q Liu, and AH Zewail. J PhysChem, 1995, 99,11309-11320. And J PhysChem, 1995, 99, 11321-11332.
