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arXiv 2107.09014physics.chem-phphysics.atm-clus
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HF二聚体隧穿转动谱的从头算势能面变分分析

Variational analysis of HF dimer tunneling rotational spectra using an ab initio potential energy surface

Oleg L. Polyansky, Roman I. Ovsyannikov, Jonathan Tennyson, Sergei P. Belov, Mikhail Yu. Tretyakov, Vladimir Yu. Makhnev, Nikolai F. Zobov

摘要:

由于Huang等人(J. Chem. Phys.,150,154302(2019))用于通过使用变分程序WAVR4求解核运动薛定谔方程来计算HF二聚体的能级。在扩展范围的转动状态的计算表明与实验数据非常好的协议。特别是已知的经验旋转常数的地面和一些观察到的激发振动状态的再现精度约为50 MHz。这种水平的准确性被证明延伸到更高的激发分子间振动态$v$和更高的激发旋转量子数$(J,K_a)$。这些计算允许在30年前记录的HF二聚体隧道旋转光谱中分配3个新的$J$分支。这些分支属于基态振动态的激发态$K_a$ = 4态和激发态分子间振动态的$K_a$ = 0态。

英文摘要:

A very accurate, (HF)$_2$ potential energy surface (PES) due to Huang et al. (J. Chem. Phys., 150, 154302 (2019)) is used to calculate the energy levels of the HF dimer by solving the nuclear-motion Schrödinger equation using variational program WAVR4. Calculations on an extended range of rotational states show very good agreement with experimental data. In particular the known empirical rotational constants for the ground and some observed excited vibrational states are reproduced with an accuracy of about 50 MHz. This level of accuracy is shown to extend to higher excited inter-molecular vibrational states $v$ and higher excited rotational quantum numbers $(J,K_a)$. These calculations allow the assignment of 3 new $J$-branches in an HF dimer tunneling-rotation spectra recorded 30 years ago. These branches belong to excited $K_a$ = 4 state of the ground vibrational state, and $K_a$ = 0 states of excited inter-molecular vibrational states.

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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