Application of intermediate-coupling scheme to thekd6(k=4,5) system

1985 ◽  
Vol 31 (2) ◽  
pp. 850-854
Author(s):  
S. Basu ◽  
A. S. Chakravarty
Keyword(s):  
Coupling Scheme ◽  
Intermediate Coupling ◽  
Intermediate Coupling Scheme

RelativisticK−LLAuger spectra in the intermediate-coupling scheme with configuration interaction

1980 ◽  
Vol 21 (2) ◽  
pp. 442-448 ◽  
Author(s):  
Mau Hsiung Chen ◽  
Bernd Crasemann ◽  
Hans Mark
Keyword(s):  
Configuration Interaction ◽  
Coupling Scheme ◽  
Intermediate Coupling ◽  
Intermediate Coupling Scheme

scholarly journals Recombination Spectra of Planetary Nebulae

1983 ◽  
Vol 103 ◽  
pp. 514-516
Author(s):  
P.O. Bogdanovich ◽  
Z.B. Rudzikas ◽  
T. H. Feklistova ◽  
A.F. Kholtygin ◽  
A.A. Nikitin ◽  
...  
Keyword(s):  
Transition Probabilities ◽  
Planetary Nebulae ◽  
Dielectronic Recombination ◽  
Wave Functions ◽  
Energy Spectra ◽  
Coupling Scheme ◽  
Intermediate Coupling ◽  
Hartree Fock ◽  
Radiative Transitions ◽  
Intermediate Coupling Scheme

The lines of the transitions between the subordinate levels of the CIII, NIII etc. ions are observed in the spectra of planetary nebulae (PN) (1). Their theoretical intensities may be found by solving the stationarity equations and accounting for both the recombination and cascade radiative transitions. It is possible to calculate the recombination spectra in various approaches: the single- or multi-configuration approximations (SCA and MCA) making use of both the superposition of configurations (SC) or the multiconfigurational Hartree-Fock-Jucys equations (2), taking into consideration the contribution of the dielectronic recombination to the intensities of the recombination lines. The energy spectra, the transition probabilities etc., as a rule ought to be calculated in the intermediate coupling scheme (2). Both analytical or numerical (e.g. Hartree-Fock) wave functions may be adopted.

scholarly journals Plasma diagnostics for planetary nebulae and H ii regions using N ii and O ii optical recombination lines

2011 ◽  
Vol 7 (S283) ◽  
pp. 432-433
Author(s):  
Ian A. McNabb ◽  
Xuan Fang ◽  
Xiao–Wei Liu ◽  
Peter J. Storey
Keyword(s):  
Plasma Diagnostics ◽  
Planetary Nebulae ◽  
Coupling Scheme ◽  
H Ii Regions ◽  
Diagnostic Analysis ◽  
Plasma Diagnostic ◽  
Intermediate Coupling ◽  
Physical Conditions ◽  
Cold Metal ◽  
Intermediate Coupling Scheme

AbstractWe carry out plasma diagnostic analysis for a number of planetary nebulae (PNe) and H ii regions. We use N ii and O ii optical recombination lines (ORLs) with new effective recombination coefficients calculated under the intermediate coupling scheme, for a range of electron temperatures (Te) and densities (Ne), and fitted against the most reliable measurements. Comparing Te derived from ORLs, collisionally excited lines (CELs), the hydrogen Balmer Jump, and/or He i if available, we find the relation Te (ORLs) < Te (He i) < Te (H i BJ) < Te (CELs), confirming the physical conditions in the bi-abundance model postulated by Liu et al., i.e. the nebula contains another cold, metal-rich and probably H-deficient component.

scholarly journals Allowed and Forbidden n = 2?2 Transitions of the Elements Kr and Mo

1984 ◽  
Vol 37 (6) ◽  
pp. 601
Author(s):  
R Glass
Keyword(s):  
Transition Probabilities ◽  
Relativistic Effects ◽  
Correlation Effect ◽  
Coupling Scheme ◽  
Intermediate Coupling ◽  
Transition Energies ◽  
Hartree Fock ◽  
Physical Assumption ◽  
Variational Process ◽  
Intermediate Coupling Scheme

Relativistic intermediate-coupling wavefunctions are used to evaluate transition energies, line strengths and transition probabilities for all allowed and forbidden n = 2-2 transitions for krypton and molybdenum beryllium-like ions. Our results are in very good agreement with those calculated using the relativistic multi-configuration Hartree-Fock approximation. These calculations were carried out under the same physical assumption that the dominant correlation effect is the n = 2 intra-shell correlation. We also discuss the importance of relativistic effects on the radial functions, the relativistic intermediate-coupling scheme in the variational process, the importance of radiative corrections for transition energies between states with different occupation of the 2s shell, and the relative importance of intra- versus inter-shell correlation effects.

Application of the intermediate-coupling scheme to a5d4system,K2OsCl6

1983 ◽  
Vol 27 (10) ◽  
pp. 6495-6497 ◽  
Author(s):  
S. Basu ◽  
A. S. Chakravarty
Keyword(s):  
Coupling Scheme ◽  
Intermediate Coupling ◽  
Intermediate Coupling Scheme

Coupled-channel description of the photodisintegration of 24Mg, 28Si, and 32S nuclei within the intermediate-coupling scheme

2000 ◽  
Vol 63 (3) ◽  
pp. 377-390
Author(s):  
E. N. Golovach ◽  
B. S. Ishkhanov ◽  
V. N. Orlin
Keyword(s):  
Coupling Scheme ◽  
Intermediate Coupling ◽  
Intermediate Coupling Scheme ◽  
Coupled Channel

scholarly journals Very deep spectroscopy of the bright Saturn nebula NGC 7009: The optical recombination spectrum and new effective recombination coefficients

2011 ◽  
Vol 7 (S283) ◽  
pp. 354-355
Author(s):  
Xuan Fang ◽  
Xiao-Wei Liu ◽  
Peter J. Storey
Keyword(s):  
Emission Lines ◽  
Atomic Data ◽  
Coupling Scheme ◽  
Recombination Line ◽  
Intermediate Coupling ◽  
Spectral Analyses ◽  
Elemental Abundances ◽  
The Rich ◽  
Intermediate Coupling Scheme ◽  
Recombination Spectrum

AbstractWe present very deep spectroscopic observations of the rich optical recombination line (ORL) spectrum of the bright Saturn nebula NGC 7009. Detailed spectral analyses, combined with systematic emission line identifications, in the whole optical range (3040–11 000 Å) give more than 1000 emission lines, over 80% of which are ORLs. New calculations of the N ii effective recombination coefficients in intermediate coupling scheme are carried out. These N ii atomic data, together with the most recent O ii and Ne ii effective recombination coefficients, are utilized in the spectral analyses of NGC 7009. Departure from LS coupling is noticed. Agreement is found between the observed and predicted relative intensities of ORLs. The elemental abundances of C, N, O, and Ne deduced from ORLs are systematically higher than those from collisionally excited lines (CELs) by a factor of 5–7.

scholarly journals Вероятности радиационных переходов в спектрах никелеподобных ионов Cd XXI, In XXII, Sn XXIII

2019 ◽  
Vol 126 (2) ◽  
pp. 118
Author(s):  
А.В. Логинов
Keyword(s):  
Electric Dipole ◽  
Coupling Scheme ◽  
Intermediate Coupling ◽  
Hartree Fock ◽  
Intermediate Coupling Scheme

AbstractProbabilities of electric-dipole 3 d ^94 p → 3 d ^10, 3 d ^94 s transitions in the spectra of nickel-like ions Cd XXI, In XXII, and Sn XXIII are calculated semiempirically in the intermediate coupling scheme. The radial integrals necessary for obtaining absolute values of the probabilities are calculated in the length form with Hartree–Fock functions.

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