The Electronic Transition Moment Function for the B3Π–X3Δ System of TiO
The Electronic Transition Moment Function for the B3Π–X3Δ System of TiO
复制标题
TiO B3Π–X3Δ体系的电子跃迁矩函数
DOI：
10.1006/jmsp.2002.8586
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Haruhiko Ito
中科院分区：
文献类型：
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作者：
K. Namiki;Haruhiko Ito
摘要 使用分散激光诱导荧光（DLIF）技术观察到了 TiO 的 C 3 Δ –X 3 Δ 跃迁中与 v′=0 和 1 相关的几个电子振动带。根据当前 DLIF 和先前发射光谱的强度分布，确定了 C 3 Δ –X 3 Δ 系统的电子跃迁矩 Re(r) 与核间距离 r 的函数关系。为了确定绝对Re(r)函数，分析中包括了报告的C 3 Δ态下v'=0和1的辐射寿命； Re(r) 确定为 Re(r)=1.3039(49)[1+22.1(28)(r−r0)2−150(25)(r−r0)3] （r0=1.65869 和 1.62093 A ⩽r⩽1.80255 A）。将获得的 Re(r) 值与 B 3 Π –X 3 Δ 系统的值、X 3 Δ 态的超精细耦合常数以及 X 3 Δ 、B 3 Π 和 C 3 Δ 态的自旋轨道常数同时分析，以评估离子和轨道特征。
Abstract Several vibronic bands associated with v′=0 and 1 for the C 3 Δ –X 3 Δ transition of TiO have been observed using a dispersed laser induced fluorescence (DLIF) technique. From intensity distributions of the present DLIF and previous emission spectra, the dependence of the electronic transition moment, Re(r), for the C 3 Δ –X 3 Δ system was determined as a function of the internuclear distance, r. For the determination of the absolute Re(r) function, the reported radiative lifetimes of v′=0 and 1 in the C 3 Δ state were included in the analysis; Re(r) was determined as Re(r)=1.3039(49)[1+22.1(28)(r−r0)2−150(25)(r−r0)3] (r0=1.65869 and 1.62093 A ⩽r⩽1.80255 A). The obtained values of Re(r) were simultaneously analyzed with those for the B 3 Π –X 3 Δ system, the hyperfine coupling constants for the X 3 Δ state, and the spin–orbit constants for the X 3 Δ , B 3 Π , and C 3 Δ states to assess the ionic and orbital characters.