CIV3 — A general program to calculate configuration interaction wave functions and electric-dipole oscillator strengths

1975 ◽  
Vol 9 (3) ◽  
pp. 141-172 ◽  
Author(s):  
A. Hibbert
Keyword(s):  
Configuration Interaction ◽  
Electric Dipole ◽  
Wave Functions ◽  
Oscillator Strengths ◽  
General Program ◽  
Dipole Oscillator

Systematic Trends in Atomic Oscillator Strengths: The Helium Isoelectronic Sequence

1972 ◽  
Vol 50 (12) ◽  
pp. 1363-1369 ◽  
Author(s):  
M. Cohen ◽  
R. P. McEachran
Keyword(s):  
Electric Dipole ◽  
Nuclear Charge ◽  
Principal Quantum Number ◽  
Wave Functions ◽  
Oscillator Strengths ◽  
Isoelectronic Sequence ◽  
Dipole Oscillator ◽  
Good Agreement ◽  
Comparison Data ◽  
Dipole Length

Electric dipole oscillator strengths (f values) have been calculated for a large number of singlet and triplet S–P, P–D, and D–F transitions in the helium isoelectronic sequence through O+6. The analytical orbital wave functions employed were of frozen-core type, and generally produce very good agreement between length and velocity values of the calculated oscillator strengths. A conspicuous exception occurs in many cases where the principal quantum number remains unchanged in the transition, and the more reliable dipole length values have been adopted for such transitions. The smooth variation of the calculated f values as functions of the inverse of the nuclear charge Z provided a sensitive check on the accuracy of the computations and indicated a considerable number of P–D transitions where the velocity values seemed the more reliable. Wherever comparison data are available, our calculated oscillator strengths are in excellent agreement with the most accurate values; in other cases, the absolute uncertainty in the f values should in no case exceed 5%.

scholarly journals Transition Parameters for Doubly Ionized Lanthanum

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Betül Karaçoban ◽  
Leyla Özdemir
Keyword(s):  
Least Squares ◽  
Configuration Interaction ◽  
Electric Dipole ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Relativistic Effects ◽  
Oscillator Strengths ◽  
Least Squares Fitting ◽  
Hartree Fock

The transition parameters such as the wavelengths, weighted oscillator strengths, and transition probabilities (or rates) for the nd (n=5−9)−nf (n=4−8), nd (n=5−9)−np (n=6−9), np (n=6−9)−ns (n=6−10), and ng (n=5−8)−nf (n=4−8) electric dipole (E1) transitions of doubly ionized lanthanum (La III, Z=57) have been calculated using the relativistic Hartree-Fock (HFR) method. In this method, configuration interaction and relativistic effects have been included in the computations combined with a least squares fitting of the Hamiltonian eigenvalues to the observed energy levels. We have compared the results obtained from this work with the previously available calculations and experiments in literature. We have also reported new transitions with the weighted transition probabilities greater than or equal to 105.

Level energies and oscillator strengths in Ni(XII)

2003 ◽  
Vol 81 (6) ◽  
pp. 861-867 ◽  
Author(s):  
Narendra Singh ◽  
Avnindra K Singh ◽  
Man Mohan
Keyword(s):  
Configuration Interaction ◽  
Ground State ◽  
Transition Probabilities ◽  
Wave Functions ◽  
Oscillator Strengths

Configuration interaction wave functions have been calculated and used to evaluate oscillator strengths and transition probabilities for dipole-allowed transitions from the ground-state levels to those of the 3s3p6 and 3s23p43d states of Ni(XII), in both LS and LSJ coupling schemes. Lifetimes of the excited levels are determined. The present results are compared with other available calculations and experiments. PACS No.: 32.70.Cs

Calculation of Wavelengths, Transition Probabilities and Oscillator Strengths for E1 and M1 Transitions in Cu-Like Au Ion

2015 ◽  
Vol 723 ◽  
pp. 799-803
Author(s):  
Min Xu
Keyword(s):  
Excited States ◽  
Magnetic Dipole ◽  
Configuration Interaction ◽  
Electric Dipole ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Oscillator Strengths ◽  
Forbidden Transitions ◽  
Calculation Results ◽  
Good Agreement

Wavelengths, transition probabilities and oscillator strengths have been calculated for electric dipole (E1) transitions and magnetic dipole (M1) transitions in Cu-like Au ion. These values are obtained in the configuration interaction (CI) and using the fully relativistic multiconfiguration Dirac-Fock (MCDF) method including quantum electrodynamical (QED) effect and Breit correction. Obtained energy levels of some excited states in Cu-like Au ion from the method are generally in good agreement with valuable theoretical and experimental results. The calculation results indicate that for high-Z highly ionized atom, some forbidden transitions are very important.

Multichannel calculation of the electric-dipole oscillator strengths for the discrete 1Se1Po transitions in helium within the hyperspherical adiabatic approach

1991 ◽  
Vol 152 (9) ◽  
pp. 467-471 ◽  
Author(s):  
A.G. Abrashkevich ◽  
D.G. Abrashkevich ◽  
M.I. Gaysak ◽  
V.I. Lendyel ◽  
I.V. Puzynin ◽  
...  
Keyword(s):  
Electric Dipole ◽  
Oscillator Strengths ◽  
Adiabatic Approach ◽  
Dipole Oscillator ◽  
Hyperspherical Adiabatic
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