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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.

Presenters

  • 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

Authors

  • 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

  • Huynh Van Sa Lam

    Kansas State University, J.R. Macdonald Laboratory, Department of Physics, Kansas State University

  • Enliang Wang

    Kansas State university, J.R. Macdonald Laboratory, Department of Physics, Kansas State University

  • John Searles

    Kansas State University, J.R. Macdonald Laboratory, Department of Physics, Kansas State University

  • Zane Phelps

    Kansas State University, J.R. Macdonald Laboratory, Department of Physics, Kansas State University

  • Artem Rudenko

    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

  • Daniel Rolles

    Kansas State University, Kansas State, J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, USA, J.R. Macdonald Laboratory, Department of Physics, Kansas State University