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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >High-Resolution Spectroscopic Investigation of the B~2A_1-X~2A_1 Transitions of CaCH_3 and SrCH_3
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High-Resolution Spectroscopic Investigation of the B~2A_1-X~2A_1 Transitions of CaCH_3 and SrCH_3

机译：CaCH_3和SrCH_3的B〜2A_1-X〜2A_1跃迁的高分辨率光谱研究

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High-resolution spectra of the B~2A_1-X~2A_1 transitions of CaCH_3 and SrCH_3 have been recorded in a molecular jet/laser ablation source using laser excitation spectroscopy.Transitions arising from the K = 0 and 1 sub-bands have been observed for both molecules.An analysis of the data using a ~2A_1 symmetric top Hamiltonian has determined rotational and spin-rotation constants for the B~2A_1 state of each molecule.From the rotational constants,structures have been estimated for both CaCH_3 and SrCH_3.The spin-rotation constant,epsilon_(bc)=(epsilon_(bb)+ epsilon_(cc))/2,in the B~2A_1 state for both molecules is in reasonable agreement with the value calculated using the pure precession approximation.For CaCH_3,the K' = 1 levels of the B~2A_1 state exhibit a perturbation that interchanges the energy ordering of the spin-rotation components.
机译：CaCH_3和SrCH_3的B〜2A_1-X〜2A_1跃迁的高分辨率光谱已通过激光激发光谱法记录在分子射流/激光烧蚀源中，观察到由K = 0和1个子带引起的跃迁使用〜2A_1对称顶部哈密顿量进行的数据分析已确定每个分子B〜2A_1状态的旋转和自旋旋转常数。从旋转常数中，已估算出CaCH_3和SrCH_3的结构。 -旋转常数，epsilon_（bc）=（epsilon_（bb）+ epsilon_（cc））/ 2，两个分子的B〜2A_1状态与使用纯进动近似法计算的值合理一致。对于CaCH_3， K'= 1的B〜2A_1状态表示扰动，使自旋旋转分量的能量顺序互换。

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