43 citations · 56 across the 13 of their papers we have counts for
9 papers · 1 filter
Second-Order Rayleigh-Schrödinger Perturbation Theory for the Grasp
G. Gaigalas, P. Rynkun, L. Kitovienė
A developed method, based on the stationary second-order Rayleigh-Schrödinger many-body perturbation theory in an irreducible tensorial form, allows us to determine the most import…
Second-Order Rayleigh-Schrödinger Perturbation Theory for the GRASP2018 Package: Three-Particle Feynman Diagram Contribution to Core-Valence Correlations
G. Gaigalas, P. Rynkun, L. Kitovienė
In order to ascertain the precise atomic characteristics, it is important to incorporate a wide range of electron correlations in the computational analysis. However, it is importa…
Second-Order Rayleigh-Schrödinger Perturbation Theory for the GRASP2018 Package: Three-Particle Feynman Diagram Contribution to Valence-Valence Correlations
G. Gaigalas, P. Rynkun, L. Kitovienė
The method based on the second-order perturbation theory to identify the most important configuration state functions of the various correlations is extended to include valence-val…
Second-Order Rayleigh-Schrödinger Perturbation Theory for the Grasp2018 Package: Valence-Valence Correlations
G. Gaigalas, P. Rynkun, L. Kitovienė
The accurate description of electron correlations remains a major challenge in atomic calculations. In order to perform accurate calculations, it is necessary to consider the vario…
Second-Order Rayleigh-Schrödinger Perturbation Theory for the GRASP2018 Package: Core-Core Correlations
G. Gaigalas, P. Rynkun, L. Kitovienė
Grasp package is based on the relativistic configuration interaction in which accurate calculations, accounting for valence, valence-valence, core-valence, core, and core-core elec…
Second-Order Rayleigh-Schrödinger Perturbation Theory for the GRASP2018 Package: Core Correlations
G. Gaigalas, P. Rynkun, L. Kitovienė
The paper presents a further development of the method G. Gaigalas, P. Rynkun, L. Kitovienė, Second-Order of Rayleigh-Schrödinger Perturbation Theory for the {\sc Grasp}2018 Packag…
Second-order Rayleigh-Schrödinger Perturbation Theory for the {\sc Grasp}2018 Package: Core-valence Correlations
G. Gaigalas, P. Rynkun, L. Kitovienė
The General Relativistic Atomic Structure package [{\sc Grasp}2018, C. Froese Fischer, G. Gaigalas, P. Jönsson, J. Bieroń, Comput. Phys. Commun. (2019), DOI: 10.1016/j.cpc.2018.10.…
Atomic data benchmarked by Large-scale Multiconfiguration Dirac-Hartree-Fock Calculations for Beryllium
Sijie Wu, Shaowei Tian, Ran Si +6
The multiconfiguration Dirac-Hartree-Fock (MCDHF) and relativistic configuration interaction (RCI) methods are used to provide excitation energies, radiative transition data, lifet…
Extended Calculations of Spectroscopic Data: Energy Levels, Lifetimes and Transition rates for O-like ions from Cr XVII to Zn XXIII
K. Wang, P. Jönsson, J. Ekman +7
Employing two state-of-the-art methods, multiconfiguration Dirac--Hartree--Fock and second-order many-body perturbation theory, the excitation energies and lifetimes for the lowest…