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43 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…
Gaussian characterization of two-neutron halo nuclei
A. Deltuva, M. Gattobigio, D. Jurčiukonis +1
The halo nucleon-core system is, by definition, a shallow state nucleus. The nucleon, in most cases a neutron, is loosely bound to the other nucleons forming the core. Accordingly,…
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: 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…