Lifetime lengthening and the Renner – Teller effect in theHCF ð ~ A 1 A 00 ~ X 1 A 0 Þ system
نویسندگان
چکیده
We report new measurements of fluorescence excitation spectra and single rovibronic level fluorescence lifetimes for ð0; t2; 0Þ ð0; 0; 0Þ bands with t2 1⁄4 0–6 in the HCF ~ AA 00 ~ X1A0 system. Due primarily to the Renner–Teller interaction, upper state levels with Ka P 1 display an obvious lengthening of lifetime with increasing energy which is strongly correlated with the presence of vibronic and rovibronic perturbations, and increases dramatically as the barrier to linearity is approached. This system provides a textbook example of the small molecule limit of radiationless
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