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Title: Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields
Authors: Wei, Zhengrong
Li, Jialin
See, Soo Teck
Loh, Zhi-Heng
Keywords: Dissociation Dynamics
Laser Fields
Issue Date: 2017
Source: Wei, Z., Li, J., See, S. T., & Loh, Z.-H. (2017). Spin–orbit state-selective C–I dissociation dynamics of the CH3I+ x̃ electronic state induced by intense few-cycle laser fields. Journal of Physical Chemistry Letters, 8(24), 6067-6072. doi:10.1021/acs.jpclett.7b03022
Series/Report no.: Journal of Physical Chemistry Letters
Abstract: Studies of ultrafast molecular dynamics induced by intense laser fields can reveal new approaches to manipulating chemical reactions in the strong-field regime. Here, we show that intense few-cycle laser pulses can induce the spin–orbit state-selective C–I dissociation of the iodomethane cation (CH3I+) in the X̃ electronic state. Irradiation of CH3I by 6 fs laser pulses with peak intensities of 1.9 × 1014 W/cm2 followed by femtosecond extreme ultraviolet probing of the iodine 4d core-level transitions reveals dissociation of the CH3I+X̃2E1/2 state with a time constant of 0.76 ± 0.16 ps. By contrast, the X̃2E3/2 spin–orbit ground state does not exhibit any appreciable dissociation on the picosecond time scale. The observed spin–orbit state-selective dissociation of the X̃ state is rationalized in terms of the laser-induced coupling to the à state. Our results suggest that the intense-laser control of photodissociation channels can be potentially extended to spin–orbit split states.
DOI: 10.1021/acs.jpclett.7b03022
Rights: © 2017 American Chemical Society. All rights reserved. This paper was published in Journal of Physical Chemistry Letters and is made available with permission of American Chemical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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