Rydberg state dynamics of rotating, vibrating H3 and the Jahn–Teller effect
Rydberg state dynamics of rotating, vibrating H3 and the Jahn–Teller effect
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旋转、振动 H3 的里德堡态动力学和 Jahn-Teller 效应
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
C. Greene
中科院分区：
文献类型：
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作者：
J. A. Stephens;C. Greene
我们扩展了最近发展的电子与三原子离子半碰撞的多通道量子亏损理论（MQDT）。计算再现了H3在其最低电离阈值附近观察到的大部分光吸收光谱。该方法利用了一个旋转振动框架变换，同时考虑振动和旋转非弹性碰撞（预电离）和l-解耦效应。简并里德堡态之间的Jahn-Teller相互作用在该公式中起着至关重要的作用。虽然H3是一个弱的Jahn-Teller分子，这种相互作用是在实验光吸收光谱中看到的主要共振特征的原因。本文计算了H_3（1s_23s_2A_1 '，vi=0，Ni=1，Ki=0）从初态到总角动量为Nf= 0，1，2的终态的光吸收的扩展光子能量范围，给出了平行和垂直（Mi=0，Nf = 0，1）偏振激发方案.在已经进行实验的光谱区域中，...
We extend a recently developed multichannel quantum defect theory (MQDT) of electron half‐collisions with a triatomic ion. The calculations reproduce much of the observed photoabsorption spectrum of H3 near its lowest ionization thresholds. The method utilizes a rovibronic frame transformation that accounts simultaneously for vibrationally and rotationally inelastic collisions (preionization) and for l‐uncoupling effects. Jahn–Teller interactions among degenerate Rydberg states play a crucial role in the formulation. Although H3 is a weak Jahn–Teller molecule, this interaction is responsible for major resonance features seen in the experimental photoabsorption spectra. Calculations over an extended photon energy range for photoabsorption from the H3 (1s23s 2A1’, vi=0, Ni=1, Ki=0) initial state into final states with total angular momentum Nf=0,1,2 are given for parallel and perpendicular (Mi=0, ‖Mf‖=0,1) polarization schemes for the excitation. In spectral regions where experiments have been carried out, ...