Core-valence and core-core correlation effects on hyperfine-structure parameters and oscillator strengths in Tl ii and Tl iii

1996 ◽  
Vol 53 (1) ◽  
pp. 192-200 ◽  
Author(s):  
Tomas Brage ◽  
David S. Leckrone ◽  
Charlotte Froese Fischer
Keyword(s):  
Hyperfine Structure ◽  
Oscillator Strengths ◽  
Structure Parameters ◽  
Correlation Effects ◽  
Core Correlation

scholarly journals Electric dipole transitions between low-lying levels in doubly ionized krypton, xenon, and radon

2018 ◽  
Vol 96 (6) ◽  
pp. 664-671 ◽  
Author(s):  
Selda Eser ◽  
Leyla Özdemir
Keyword(s):  
Atomic Structure ◽  
Electric Dipole ◽  
Relativistic Effects ◽  
General Purpose ◽  
Oscillator Strengths ◽  
Transition Rates ◽  
Correlation Effects ◽  
Core Correlation ◽  
Line Strengths

Using the general-purpose relativistic atomic structure package (GRASP) based on a fully relativistic multiconfiguration Dirac–Fock (MCDF) method, the transition parameters, such as transition rates (probabilities), oscillator strengths, and line strengths for the electric dipole transitions between low-lying levels are evaluated for doubly ionized krypton, xenon, and radon. Breit interactions for relativistic effects and quantum electrodynamical (QED) contributions besides valence and valence–core correlation effects are taken into account in calculations. We compare the results obtained with the available data in the literature and discuss them, when possible.

scholarly journals HYPERFINE STRUCTURE PARAMETERS FOR COMPLEX ATOMS WITHIN RELATIVISTIC MANY-BODY PERTURBATION THEORY

2021 ◽  
pp. 52-59
Author(s):  
M. Makushkina ◽  
O. Antoshkina ◽  
O. Khetselius
Keyword(s):  
Perturbation Theory ◽  
Hyperfine Structure ◽  
Finite Size ◽  
Structure Parameters ◽  
Radiative Corrections ◽  
Correlation Effects ◽  
Many Body ◽  
Radium Isotope ◽  
Hartree Fock ◽  
Many Body Perturbation Theory

The calculational results for the hyperfine structure (HFS) parameters for the Mn atom (levels of the configuration 3d64s) and  the results of advanced calculating the HFS constants and nuclear quadrupole moment for the radium isotope are obtained on the basis of computing within the relativistic many-body perturbation theory formalism with a correct and effective taking into account the exchange-correlation, relativistic, nuclear and radiative corrections. Analysis of the data shows that an account of the interelectron correlation effects is crucial in the calculation of the hyperfine structure parameters.  The fundamental reason of physically reasonable agreement between theory and experiment is connected with the correct taking into account the inter-electron correlation effects, nuclear (due to the finite size of a nucleus), relativistic and radiative corrections. The key difference between the results of the relativistic Hartree-Fock Dirac-Fock and many-body perturbation theory methods calculations is explained by using the different schemes of taking into account the inter-electron correlations as well as nuclear and radiative ones.

scholarly journals Natural orbitals in multiconfiguration calculations of hyperfine-structure parameters

2020 ◽  
Vol 101 (6) ◽  
Author(s):  
Sacha Schiffmann ◽  
Michel Godefroid ◽  
Jörgen Ekman ◽  
Per Jönsson ◽  
Charlotte Froese Fischer
Keyword(s):  
Hyperfine Structure ◽  
Structure Parameters ◽  
Natural Orbitals

Large atomic core—core correlation effects

1991 ◽  
Vol 180 (4) ◽  
pp. 365-368 ◽  
Author(s):  
Lars G.M. Pettersson
Keyword(s):  
Correlation Effects ◽  
Atomic Core ◽  
Core Correlation
Sign in / Sign up

Export Citation Format

Share Document