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arXiv 1002.1626physics.atom-phphysics.chem-ph
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Potential energy和H3分子的偶极矩面

Potential energy and dipole moment surfaces of H3- molecule

M. Ayouz, O. Dulieu, R. Guerout, J. Robert, V. Kokoouline

摘要:

在大量几何构型下,确定了最简单三原子负离子H ~ 3-电子基态的一个新的势能面。与以前的研究相比,它的准确性在短距离和长距离上都有所提高。首次计算了该态的永久偶极矩面。得到了H3-的9个振动能级和D3-的14个振动能级,它们的束缚距离分别不超过~70 cm^{-1}和~ 126 cm^{-1}。这些结果将指导H_3 ~-离子存在下的分子氢冷气体(低于100 K)中H_3 ~-离子的光谱研究。

英文摘要:

A new potential energy surface for the electronic ground state of the simplest triatomic anion H3- is determined for a large number of geometries. Its accuracy is improved at short and large distances compared to previous studies. The permanent dipole moment surface of the state is also computed for the first time. Nine vibrational levels of H3- and fourteen levels of D3- are obtained, bound by at most ~70 cm^{-1} and ~ 126 cm^{-1} respectively. These results should guide the spectroscopic search of the H3- ion in cold gases (below 100K) of molecular hydrogen in the presence of H3- ions.

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