I2− photofragmentation/recombination dynamics in size-selected I2−(CO2)<i>n</i> cluster ions: Observation of coherent I...I− vibrational motion

Abstract

We have employed picosecond pump–probe techniques in conjunction with a tandem time-of-flight mass spectrometer to investigate the caging dynamics of photodissociated I2− solvated with a specific number of CO2 molecules. In this paper, we report the observation of a recurrence at ≊2 ps in the I2− absorption recovery, a feature which is attributed to coherent I...I− nuclear motion following I2− photoexcitation.