期刊
CHEMICAL PHYSICS LETTERS
卷 442, 期 1-3, 页码 164-169出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2007.05.066
关键词
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An efficient computational scheme for using the relativistic and non-relativistic quasidegenerate perturbation theory with general multiconfigurational reference functions is implemented. The scheme is based on the matrix element between the reference and the zero- to two-electron ionized determinants. Comparison with a previous scheme based on diagrams is made using the excitation spectra of [PtCl4](2-), CH3I, and H2CO as examples, and the efficiency of the scheme is illustrated. (c) 2007 Elsevier B.V. All rights reserved.
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