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- W2016181272 abstract "We use photofragment imaging to study the internal-state and velocity distributions of methyl fragments following photodissociation of CH3I molecules in a pulsed molecular beam by 266 nm radiation. The methyl fragments are state-selectively ionized via 2 + 1 resonance-enhanced multiphoton ionization (REMPI) through the 3pz Rydberg state. The velocity distribution for a particular internal state of the methyl radical is obtained from the images; this velocity distribution is then used to determine the branching of the methyl iodide into either the ground-state iodine, I(2P32), or excited-state iodine I(2P12), channel or the selected state of the methyl radical. We find that the branching ratio, I(2P32)/I(2Psol12), increases with increasing vibrational excitation in the methyl fragment. In addition, we use a line by line analysis to extract populations from the observed spectra of the 000 band of the 3pz←X̃ transition of the CH3 fragment. The fit reproduces the observed spectrum and represents conservation of the K quantum number (spin about the C3 axis) upon dissociation. For internally cold parent molecules, the amount of rotational energy about the fragment figure axis is found to be about 8 cm−1 and about 106 cm−1 for rotational energy perpendicular to the figure axis." @default.
- W2016181272 created "2016-06-24" @default.
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- W2016181272 date "1989-03-01" @default.
- W2016181272 modified "2023-10-13" @default.
- W2016181272 title "Photofragment imaging: The 266 nm photodissociation of CH3I" @default.
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- W2016181272 doi "https://doi.org/10.1016/s0009-2614(89)87111-8" @default.
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