MOLECULAR-BEAM OPTOTHERMAL SPECTROSCOPY OF THE 9.6-MU-M NU-14-BAND OF BENZENE

被引:38
作者
JUNTTILA, ML [1 ]
DOMENECH, JL [1 ]
FRASER, GT [1 ]
PINE, AS [1 ]
机构
[1] NATL INST STANDARDS & TECHNOL,DIV MOLEC PHYS,GAITHERSBURG,MD 20874
关键词
D O I
10.1016/0022-2852(91)90074-K
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
The ν14 ℓ1u fundamental band of C6H6 has been recorded with sub-Doppler resolution under collisionless low-temperature molecular-beam conditions using bolometric detection of molecules excited by tunable microwave sidebands of a Lamb-dip-stabilized CO2 laser. The sidebands cover about 40% of the spectrum between laser lines in which 117 transitions for J, K ≤ 11 have been observed and fit to a precision of ±24 kHz, yielding improved ground and excited state rotational constants with nearly microwave accuracy. Our measured ground state rotational constant, B0 = 0.189 773 89 (3) cm-1, is compared with several disparate values reported previously. © 1991.
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页码:513 / 520
页数:8
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