期刊
JOURNAL OF CHEMICAL PHYSICS
卷 134, 期 9, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.3558739
关键词
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资金
- DFG
- European Research Council [FP7/2007-2013]
- ERC [227597]
- Graduiertenkolleg of the Interdisciplinary Center for Scientific Computing (IWR) of the University of Heidelberg
- EPSRC [PHQL_P21289]
- MIUR [2008KJX4SN_003]
- EPSRC [EP/H003657/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H003657/1] Funding Source: researchfish
- European Research Council (ERC) [227597] Funding Source: European Research Council (ERC)
Electronically excited states of atoms and molecules in an environment may decay in interatomic processes by transferring excess energy to neighboring species and ionizing them. The corresponding interatomic decay width is the most important characteristic of the decay allowing to calculate its efficiency and the final states' distribution. In this paper we present calculations of interatomic widths by the Fano-Stieltjes method applied to Lanczos pseudospectra, which has been previously shown to provide accurate autoionization widths in atoms and molecules. The use of Lanczos pseudospectra allows one to avoid the full diagonalization bottleneck and makes the method applicable to larger systems. We apply the present method to the calculation of interatomic decay widths in NeMg, NeAr and HCN center dot Mg-n, n = 1, 2 clusters. The results are compared with widths obtained analytically and by other ab initio methods where available. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3558739]
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