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题名: A hierarchical construction scheme for accurate potential energy surface generation: An application to the F+H(2) reaction
作者: Fu, Bina1, 2;  Xu, Xin3;  Zhang, Dong H.1, 2
刊名: JOURNAL OF CHEMICAL PHYSICS
发表日期: 2008-07-07
DOI: 10.1063/1.2955729
卷: 129, 期:1
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Physics
英文摘要: We present a hierarchical construction scheme for accurate ab initio potential energy surface generation. The scheme is based on the observation that when molecular configuration changes, the variation in the potential energy difference between different ab initio methods is much smaller than the variation for potential energy itself. This means that it is easier to numerically represent energy difference to achieve a desired accuracy. Because the computational cost for ab initio calculations increases very rapidly with the accuracy, one can gain substantial saving in computational time by constructing a high accurate potential energy surface as a sum of a low accurate surface based on extensive ab initio data points and an energy difference surface for high and low accuracy ab initio methods based on much fewer data points. The new scheme was applied to construct an accurate ground potential energy surface for the FH(2) system using the coupled-cluster method and a very large basis set. The constructed potential energy surface is found to be more accurate on describing the resonance states in the FH(2) and FHD systems than the existing surfaces. (c) 2008 American Institute of Physics.
关键词[WOS]: DYNAMICS CALCULATIONS ;  CLASSICAL DYNAMICS ;  TRANSITION-STATE ;  QUANTUM ;  SCATTERING ;  DISTRIBUTIONS ;  RESONANCE
语种: 英语
WOS记录号: WOS:000257468100003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141234
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Theoret & Computat Chem, Dalian 116023, Peoples R China
3.Xiamen Univ, Dept Chem, Xiamen 361005, Fujian, Peoples R China

Recommended Citation:
Fu, Bina,Xu, Xin,Zhang, Dong H.. A hierarchical construction scheme for accurate potential energy surface generation: An application to the F+H(2) reaction[J]. JOURNAL OF CHEMICAL PHYSICS,2008,129(1).
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