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On the computations of interatomic Coulombic decay widths with R-matrix method

Sisourat, Nicolas; Engin, Selma; Gorfinkiel, Jimena D.; Kazandjian, Sévan; Kolorenč, Přemysl and Miteva, Tsveta (2017). On the computations of interatomic Coulombic decay widths with R-matrix method. The Journal of Chemical Physics, 146(24), article no. 244109.

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Interatomic Coulombic Decay (ICD) is a general mechanism in which an excited atom can transfer its excess energy to a neighbor which is thus ionized. ICD belongs to the family of Feshbach resonance processes, and, as such, states undergoing ICD are characterized by their energy width. In this work, we investigate the computations of ICD widths using the R-matrix method as implemented in the UKRmol package. Helium dimer is used here as a benchmark system. The results are compared with those obtained with the well established Fano-Algebraic Diagrammatic Construction method. It is shown that the R-matrix method in its present implementation provides accurate total and partial widths if the kinetic energy of the ICD electron is lower than 10 eV. Advantages and limitations of the R-matrix method on the computations of ICD widths are discussed.

Item Type: Journal Item
ISSN: 0021-9606
Project Funding Details:
Funded Project NameProject IDFunding Body
Not Set705515European Union Horizon 2020
Not SetANR-16-CE29-0016-01Agence Nationale de la Recherche
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Physics
Item ID: 50401
Depositing User: Jimena Gorfinkiel
Date Deposited: 03 Aug 2017 10:48
Last Modified: 02 May 2018 14:32
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