Photodissociation dynamics of the CH3 radical at 212.5 nm excitation has been studied experimentally using the H atom Rydberg tagging time-of-flight method. CH3 radicals are produded by photodissociation of CH3I at 266 nm. Translational energy distribution and angular distribution for the CH2 product from CH3 photodissociation at different vibrational levels via the 3s Rydberg state have been measured. From these distributions, product J state distributions are obtained for photodissociation of different vibrationally excited CH3 radicals. The effect of parent vibrational as well as rotational excitation on the dissociation dynamics of CH3 is also investigated in detail. Experimental results in this work show that parent vibrational excitation in the umbrella mode has a significant effect on both rotational excitation and angular distribution of the CH2 product, while parent rotational excitation has obvious effect only on the angular distribution of CH2 product.
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August 2006
Research Article|
August 01 2006
Effect of Parent Internal Excitation on Product State Distribution in Methyl Radical Photodissociation at 212.5 nm
Guo-rong Wu;
Guo-rong Wu
1State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023
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Jing-hui Zhang;
Jing-hui Zhang
2Institute of Atomic and Molecular Sciences, Academia Sinica Taipei 23-166
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Steven A. Harich;
Steven A. Harich
1State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023
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Xue-ming Yang
Xue-ming Yang
1State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023
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Chin. J. Chem. Phys. 19, 109–116 (2006)
Article history
Received:
March 08 2005
Accepted:
June 30 2005
Citation
Guo-rong Wu, Jing-hui Zhang, Steven A. Harich, Xue-ming Yang; Effect of Parent Internal Excitation on Product State Distribution in Methyl Radical Photodissociation at 212.5 nm. Chin. J. Chem. Phys. 1 August 2006; 19 (2): 109–116. https://doi.org/10.1360/cjcp2006.19(2).109.8
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