Time-resolved wavelength-dependent excited-state dynamics of diiodomethane
POSTER
Abstract
We investigate the time-dependent excited-state dynamics of diiodomethane (CH2I2) induced by variable-wavelength UV light using a UV-IR pump-probe scheme. The tunable UV pump pulse generated from an optical parametric amplifier (OPA) allows us to study the wavelength-dependent effects in a broad range (266nm – 330nm) of the UV spectrum. Strong-field Coulomb explosion imaging performed in a multi-ion coincidence mode using a velocity map imaging spectrometer gives detailed information about the processes. The dissociation dynamics and vibrational-mode motion, e.g., the scissor movement of the I-C-I angle, are reflected in the delay-dependent kinetic energy release (KER) spectra and angular distributions.
*Supported by the Chemical Science, Geosciences, and Bio-Science division, Office of Basic Energy Science, Office of Science, U.S. Department of Energy, grant no. DE-FG02-86ER13491, and by the National Science Foundation grant no. PHYS-1753324 (A.V.).
Presenters
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Anbu S Venkatachalam
- Kansas State University
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, USA
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University