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arXiv 0812.1211physics.chem-ph
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XY2分子的整体代数处理:对D2S的应用

A Global Algebraic Treatment for XY2 Molecules : Application to D2S

O. V. Gromova, F. Michelot, C. Leroy, O. N. Ulenikov, Y. Pashayan-Leroy, E. S. Bekhtereva

摘要:

我们建议使用的$XY_2$分子的一些结果,以前建立了一系列的文章中的振动模式和电子态的$E$对称类型。我们首先总结了标准的$u(2)\supset su(2)\supset so(2)$链的形式主义,在其大部分情况下,可以保留的伸缩和弯曲模式的$XY_2$分子的研究。接下来,在所考虑的方法中,还引入了用于拉伸模式的标准链$u(3)\supset u(2) \supset su(2) \supset so(2)$,这是必要的。建立了$u(3)$的不可约表示(\textit{irrep})$[N00]\equiv [N\dot{0}]$内的所有算子,并在标准基内计算了它们的矩阵元素。所有的拉伸-弯曲相互作用算子考虑到与共振$ω_1\approx ω_3 \approx 2 ω_2$的polyad结构得到。作为一个例子,考虑的$D_2S$分子系统的应用,特别是在$C_{2v}$的对称化。它表明,我们的酉形式主义允许复制在一个非常令人满意的方式所有的实验数据的解离极限。

英文摘要:

We suggest to use for $XY_2$ molecules some results previously established in a series of articles for vibrational modes and electronic states with an $E$ symmetry type. We first summarize the formalism for the standard $u(2)\supset su(2)\supset so(2)$ chain which, for its most part, can be kept for the study of both stretching and bending modes of $XY_2$ molecules. Next the also standard chain $u(3)\supset u(2) \supset su(2) \supset so(2)$ which is necessary, within the considered approach, is introduced for the stretching modes. All operators acting within the irreducible representation (\textit{irrep}) $[N00]\equiv [N\dot{0}]$ of $u(3)$ are built and their matrix elements computed within the standard basis. All stretch-bend interaction operators taking into account the polyad structure associated with a resonance $ω_1\approx ω_3 \approx 2 ω_2$ are obtained. As an illustration, an application to the $D_2S$ molecular system is considered, especially the symmetrization in $C_{2v}$. It is shown that our unitary formalism allows to reproduce in an extremely satisfactory way all the experimental data up to the dissociation limit.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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