DYNAMICS OF SELECTED ROVIBRONIC EIGENSTATES IN THE V-SYSTEM OF CARBON-DISULFIDE (CS2)-C-12,13

被引:20
作者
BITTO, H
RUZICIC, A
HUBER, JR
机构
[1] Physikalisch-Chemisches Institut der Universität Zürich, CH-8057 Zürich
关键词
D O I
10.1016/0301-0104(94)00286-X
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 dynamics of individual eigenstates of carbon disulfide, (CS2)-C-12 and (CS2)-C-13, resulting from the interaction of rovibronic levels of the B-1(2) State with background states, have been investigated in the lowest vibronic state 10V. Using time-resolved spectroscopy with FTL nanosecond laser pulses of jet-cooled molecules, eigenstate absorption intensities, linewidths gamma = 1/tau = (0.6-6.0) x 10(5) s(-1), and magnetic properties were determined, with the latter measured by Lande g factors of up to 0.04 in (CS2)-C-12 and hyperfine splittings of up to 10 MHz in (CS2)-C-13. The intensities and linewidths were found to be linearly correlated in sets of eigenstates of a rovibronic level. This behaviour revealed the background states to be essentially dark, allowing us to estimate the linewidths of the zero-order states. Hyperfine splittings and g factors show no simple correlation with the intensity, a finding which is attributed to the second-order origin of the background state magnetic properties. Based on the density and the characteristics of the eigenstates, a coupling scheme is proposed, for which the background states represent rovibronic levels of the B-evs(2) spin component of the (3)A(2) electronic state interacting with highly excited rovibronic levels of the 1 Sigma(g)(+) electronic ground state.
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页码:713 / 724
页数:12
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