Core-polarization corrected Dirac-Fock computations of one-electron spectra in the rubidium isoelectronic sequence: Mo VI through Pb XLVI

2021 ◽  
pp. 101455
Author(s):  
J. Migdalek
Keyword(s):  
Isoelectronic Sequence ◽  
Core Polarization ◽  
Electron Spectra

Core-polarization corrected relativistic energies and radiative data for one-electron spectra of Bi V through U XIV

2018 ◽  
Vol 96 (6) ◽  
pp. 610-614 ◽  
Author(s):  
J. Migdalek
Keyword(s):  
Oscillator Strength ◽  
Electron Correlation ◽  
Valence Electron ◽  
Energy Levels ◽  
Oscillator Strengths ◽  
Isoelectronic Sequence ◽  
Core Polarization ◽  
Electron Spectra ◽  
Collapse Region ◽  
Ionized Systems

The relativistic core-polarization corrected Dirac–Fock energy levels, oscillator strength, and lifetimes are predicted for highly ionized spectra of gold isoelectronic sequence from Bi V through U XIV. It is demonstrated that core polarization (core–valence electron correlation) strongly affects oscillator strengths and lifetimes of 6s–6p, 6p–5d, and 6d–5f transitions (the latter particularly in the vicinity of the collapse region) even for highly ionized systems of gold isoelectronic sequence.

Systematic trends along the potassium sequence: Study of ns2S–mp2P0 transitions

1991 ◽  
Vol 69 (10) ◽  
pp. 1273-1283 ◽  
Author(s):  
Inmaculada Martin ◽  
Carmen Lavín ◽  
Carmen Barrientos
Keyword(s):  
Dipole Transition ◽  
Quantum Defect ◽  
Oscillator Strengths ◽  
Transition Operator ◽  
Graphical Form ◽  
Isoelectronic Sequence ◽  
Core Polarization ◽  
Polarization Effects ◽  
General Improvement ◽  
Sequence Study

The quantum defect orbital (QDO) method, with the use of a core polarization-corrected dipole transition operator, was employed to determine oscillator strengths for potassium and some of its isoelectronic ions (CaII–CrVI). The inclusion of core-valence polarization effects leads to a general improvement of the QDO f values. Systematic trends of individual oscillator strengths along the isoelectronic sequence are also shown in a graphical form.

Beam-foil measurements of lifetimes of energy levels belonging to Sn III and Sn IV

1987 ◽  
Vol 65 (1) ◽  
pp. 7-12 ◽  
Author(s):  
E. H. Pinnington ◽  
J. A. Kernahan ◽  
W. Ansbacher
Keyword(s):  
Decay Curve ◽  
Energy Levels ◽  
Resonance Transition ◽  
Isoelectronic Sequence ◽  
Core Polarization ◽  
Hartree Fock ◽  
Intensity Decay ◽  
Polarization Calculation ◽  
Beam Foil ◽  
Good Agreement

Beam-foil intensity decay curves for transitions in the wavelength range 750–5250 Å are used to derive the lifetimes of the 6s1S, 5p1P, 6p1P, 5d1D, 6d1D, 5p21D, 4f1F, 6s3S, 6p3p, 5p23p, 5d3D, 6d3D, and 4f3F levels of Sn III, and of the 6s2S, 5p2P, 6p2P, 5d2D, 6d2D, 4d95 s22D, and 4f2F levels of Sn IV. The arbitrarily normalized decay-curve analyses are used for most levels. Good agreement is found between experiment and a recent (relativistic Hartree–Fock + core-polarization) calculation for the resonance transition in low-Z members of the Cd 1 isoelectronic sequence, but the experimental f values are found to lie systematically about 20% above the theoretical trend obtained from a similar calculation for the Ag I sequence. Configuration interaction is found to produce very different lifetimes for the two 4d95s22D levels of Sn IV, and the energy of the J = 3/2 level is determined to be 177 060 ± 50 cm−1.

Core-polarization effects in the cadmium isoelectronic sequence

2000 ◽  
Vol 62 (3) ◽  
Author(s):  
Emile Biémont ◽  
Charlotte Froese Fischer ◽  
Michel R. Godefroid ◽  
Patrick Palmeri ◽  
Pascal Quinet
Keyword(s):  
Isoelectronic Sequence ◽  
Core Polarization ◽  
Polarization Effects

Recent Radiative and Collisional Atomic Data of Astrophysical Interest

1988 ◽  
Vol 102 ◽  
pp. 129-132
Author(s):  
K.L. Baluja ◽  
K. Butler ◽  
J. Le Bourlot ◽  
C.J. Zeippen
Keyword(s):  
Mass Production ◽  
Bound States ◽  
Physical Models ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Atomic Data ◽  
Isoelectronic Sequence ◽  
Astrophysical Interest ◽  
Radiative Transitions ◽  
Forbidden Transitions

SummaryUsing sophisticated computer programs and elaborate physical models, accurate radiative and collisional atomic data of astrophysical interest have been or are being calculated. The cases treated include radiative transitions between bound states in the 2p4and 2s2p5configurations of many ions in the oxygen isoelectronic sequence, the photoionisation of the ground state of neutral iron, the electron impact excitation of the fine-structure forbidden transitions within the 3p3ground configuration of CℓIII, Ar IV and K V, and the mass-production of radiative data for ions in the oxygen and fluorine isoelectronic sequences, as part of the international Opacity Project.

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