Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 115, Issue 18, Pages 8359-8365Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1410975
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Photofragment translational spectroscopy has been used to investigate the dissociation dynamics of 1,2-butadiene at 193 nm. Ionization of scattered photoproducts was accomplished using tunable VUV synchrotron radiation at the Advanced Light Source. Two product channels are observed: CH3+C3H3 and C4H5+H. The C3H3 product can be identified as the propargyl radical through measurement of its photoionization efficiency curve, whereas the C4H5 product cannot be identified definitively. The translational energy P(E-T) distributions suggest that both channels result from internal conversion to the ground electronic state followed by dissociation. The P(E-T) distribution for the C4H5 product is sharply truncated below 7 kcal/mol, indicating spontaneous decomposition of the slowest C4H5 product. (C) 2001 American Institute of Physics.
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