SLICED FLUORESCENCE IMAGING Kuomei Chen and Yuwei Chen

SLICED FLUORESCENCE IMAGING Kuo-mei Chen and Yu-wei Chen Department of Chemistry, National Sun Yat-sen University Kaohsiung, Taiwan, ROC 1

Photo-induced dynamic processes can be studied in a bulb environment by the sliced fluorescence imaging method. 2

ION IMAGING Molecular photofragmentation processes inelastic scatterings reactive scatterings RESOLUTION IMPROVEMENTS Velocity map imaging techniques Slice imaging techniques EXPERIMENTAL CONDITIONS Beam environment REMPI detection scheme 3

LASER-INDUCED FLUORESCENCE DETECTION SCHEMES Important transient species (OH, CN, HCO, etc) in the study of chemical dynamics One-dimensionally projected profiles of state-selected products Doppler spectroscopic techniques (LIF) SLICED FLUORESCENCE IMAGING METHOD Simplicity Versatility Simultaneous determination of angular and speed distributions of state-selected photoproducts 4

REDUCTION OF IMAGE BLURRING The combination of sliced crescents (red) is equivalent to a 2 D projection of the fluorescent Newton sphere from a single photolysis center at the origin. 5

EXPERIMENTAL APPRATUS 6

ICN 266 nm I* + CN I + CN 7

EXPERIMENTAL RESULTS 8

COLLISIONAL RELAXATION EXPERIMENTS 9

PERSPECTIVES OF SLICED FLUORESCENCE IMAGINGS (SFI) Molecular photofragmentation processes (bulb or beam environment) State-to-state collisional energy transfers (bulb environment) Photo-initiated chemical reactions (PHOTOLOC + SFI, differential cross sections, polarization-dependent differential cross sections) 10

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