The study of the core–valence and core–core correlation effects on the radiative properties along the magnesium isoelectronic sequence

2018 ◽  
Vol 123-124 ◽  
pp. 313-328 ◽  
Author(s):  
C. Iorga ◽  
V. Stancalie
Keyword(s):  
Radiative Properties ◽  
Correlation Effects ◽  
Isoelectronic Sequence ◽  
The Core ◽  
Core Correlation

scholarly journals Evaluation of Core Correlation Effects in the 4s4p1P0 State of Calcium

1985 ◽  
Vol 38 (4) ◽  
pp. 603 ◽  
Author(s):  
R Glass
Keyword(s):  
Configuration Interaction ◽  
Correlation Functions ◽  
Correlation Effects ◽  
The Core ◽  
Core Correlation

In this paper two different approaches are used to study core correlation effects in the 3p64s4p I pO state of calcium. We show that the number of relevant configurational functions in the configuration interaction expansion can be reduced by determining the core correlation functions prior to the valence correlation functions. We also show that core correlation effects of the form 3p2 ~ nP can be represented in the configuration interaction expansion by including configurational functions of the type 3p4(S L) nP(S L){ IS 14s4p in the expansion.

Quintet States 1s2s2p2 5P and 1s2p3 5So for Be-Like Systems

2019 ◽  
Vol 74 (9) ◽  
pp. 743-749
Author(s):  
Kai Kai Li ◽  
Lin Zhuo ◽  
Yan Sun ◽  
Bing Cong Gou
Keyword(s):  
Variational Method ◽  
Excited States ◽  
Relativistic Effect ◽  
Oscillator Strengths ◽  
Isoelectronic Sequence ◽  
The Core ◽  
Transition Wavelength ◽  
Computational Data ◽  
First Time ◽  
Hyperfine Structures

AbstractBy systematic Rayleigh–Ritz variation calculations, the energies are reported for the core-excited states 1s2s2p2 5P and 1s2p3 5So in the Be-like isoelectronic sequence (Z = 11–20). Energy corrections, including the restricted variational method, mass polarisation, and relativistic effect, are considered to improve the accuracy of energy. The oscillator strengths and transition wavelength between these states are also reported. Computational data on hyperfine structures presented in this paper are calculated for the first time.

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

Avinash–Shukla mass limit for the maximum dust mass supported against gravity by electric fields

2010 ◽  
Vol 76 (3-4) ◽  
pp. 493-500 ◽  
Author(s):  
K. AVINASH
Keyword(s):  
Electric Fields ◽  
Stable Equilibrium ◽  
Compact Objects ◽  
Correlation Effects ◽  
Mass Limit ◽  
Interstellar Clouds ◽  
New Class ◽  
The Core ◽  
Dust Mass ◽  
Astrophysical Objects

AbstractThe existence of a new class of astrophysical objects, where gravity is balanced by the shielded electric fields associated with the electric charge on the dust, is shown. Further, a mass limit MA for the maximum dust mass that can be supported against gravitational collapse by these fields is obtained. If the total mass of the dust in the interstellar cloud MD > MA, the dust collapses, while if MD < MA, stable equilibrium may be achieved. Heuristic arguments are given to show that the physics of the mass limit is similar to the Chandrasekar's mass limit for compact objects and the similarity of these dust configurations with neutron and white dwarfs is pointed out. The effect of grain size distribution on the mass limit and strong correlation effects in the core of such objects is discussed. Possible location of these dust configurations inside interstellar clouds is pointed out.

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