Citation: Li Wei, Qu Jun-Yan, Zhao Xin-Sheng. Ab initio Investigation on the Potential Energy Surface of [He3H]+[J]. Acta Physico-Chimica Sinica, ;2003, 19(08): 751-756. doi: 10.3866/PKU.WHXB20030816
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By scanning some special configurations on the ground state potential energy surface of [He3H]+ molecule with the CCSD(T)/aug-cc-pVTZ method, the influence of three-body interaction in the traditional many-body expansion is discussed. It is found that to describe the potential even in such a simple system the inclusion of three-body interaction is necessary. On the other hand, around the stable structures the potential expansion up to three-body interaction is fairly accurate, even though the error grows up in the repulsive region. The equilibrium geometries of [He4H]+ are also investigated. It is shown that there exists a core of [He2H]+ in the [HenH]+ clusters. Fig.5 Tab.3 Ref.27
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