DIRECT ABSORPTION-SPECTRA OF JET-COOLED BENZENE IN 130-260-NM

被引:131
作者
HIRAYA, A
SHOBATAKE, K
机构
[1] Institute for Molecular Science, Myodaiji, Okazaki
关键词
D O I
10.1063/1.460155
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The direct absorption spectrum of benzene in a free jet has been measured in the 130-260 nm region (S1, S2, and S3 states, Rydberg series, and the first ionization limit) using synchrotron radiation as a light source. The absolute molar extinction coefficients (epsilon) of benzene in jets have been determined by scaling measured free-jet values to the known value in the vapor phase for a broadband at 200.1 nm in the S2 state. The vibrational temperature for nu-16 mode was estimated to be 185 K. The maximum value of epsilon of the S1 absorption system was found to be 1400 l mol-1 cm-1 (spectral bandwidth = 0.065 nm). A shoulder observed at 205.45 nm in the S2 absorption system is assigned to the S2 origin, induced by pseudo-Jahn-Teller distortion.
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页码:7700 / 7706
页数:7
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