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Citation: ZHOU Xiao-guo, LIU Shi-lin. Rotational Analysis of the A²A''(v'=0)←X²A'(v''=0) Band of the Vinyl Radical[J]. Acta Physico-Chimica Sinica, ;2006, 22(01): 6-10. doi: 10.3866/PKU.WHXB20060102 shu

Rotational Analysis of the A²A''(v'=0)←X²A'(v''=0) Band of the Vinyl Radical

1.
Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China

Received Date: 26 May 2005
Available Online: 15 January 2006

The vinyl radical was generated by photolysing methyl vinyl ketone with 193 nm laser, then was excited and photodissociated by another laser in the 20020～20070 cm_-1 range. The dissociated H atom fragments were ionized and detected by (1+1′) resonance-enhanced multiphoton ionization (REMPI) process. The rotationally resolved action spectra of theA²A''(v'=0)←X²A'(v''=0)band of the vinyl radical were recorded by monitoring the H⁺ ion intensity with dissociation laser wavelength. The corresponding assignments were obtained with the aid of ab initio calculations and spectroscopic simulations, and 40 rotational lines were definitely assigned. Additionally, the predissociative lifetime of the •C₂H₃ A²A''(v'= 0 ) state was 3.3 ps and independent of the rotational levels, which was derived from the linewidth.
- Vinyl radical;Resonance-enhanced multiphoton ionization;Rotational spectroscopy;Predissociation
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Rotational Analysis of the A2A''(v'=0)←X2A'(v''=0) Band of the Vinyl Radical

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Rotational Analysis of the A²A''(v'=0)←X²A'(v''=0) Band of the Vinyl Radical