1,720,981 research outputs found
Transition Energies of Lutetium
No full textTransition energies of neutral lutetium (Lu I, Z = 71) belonging to the lanthanide series, including the ionization potential, excitation energies, and electron affinity, are calculated by the multiconfiguration Hartree-Fock method within the framework of the Breit-Pauli Hamiltonian and the relativistic Hartree-Fock method. We also report on the ionization potential and excitation energies of Lu II and Lu III. The results obtained have been compared with other works
Electric dipole transitions for LaI (Z=57)
No full textWavelengths, weighted oscillator strengths and transition probabilities for electric dipole (El) transitions for some excited levels in neutral lanthanum (La I, Z = 57) have been calculated using the multiconfiguration Hartree-Fock (MCHF) method within the framework of Breit-Pauli relativistic corrections. Results obtained have been compared with other calculations and experiments. A discussion of these calculations for La I in this study has also been given in view of the MCHF method. (c) 2008 Elsevier Ltd. All rights reserved
The Hyperfine Structure Calculations of Some Excited Levels for La-139 I
No full textWe calculated hyperfine structure constants of the 5d6s(2), 5d(2)6s, 5d(3), 5d(2)7s, 5d6s7s, 5d6p(2), 4f(2)5d, 4f6s6p, 5d6s6p, 5d(2)6p, 4f5d6s and 4f5d(2) levels for La-139 I (Z = 57). The calculations are based upon the multicorifiguration Hartree-Fock method within the framework of the Breit-Pauli relativistic corrections. Moreover, the results obtained were compared with other available calculations and experiments
AIP Conference Proceedings
No full textEnergy calculations for some levels in H-, He- and Li-like sulphur have been obtained using multiconfiguration Hartree-Fock (MCHF) approximation with Breit-Pauli relativistic corrections. Results obtained have been compared with other calculations and experiments
Electric dipole transitions for highly excited states in helium-like sulphur
No full textWe have calculated relativistic energies, weighted oscillator strengths and transition probabilities for electric dipole (El) transitions among the terms belonging to 1snl (n <= 9, l <= 3) configurations in helium-like sulphur. The calculations are based upon the multiconfiguration Hartree-Fock method within the framework of Breit-Pauli relativistic corrections. Our calculated values are also compared with other experimental and theoretical results. (C) 2007 Elsevier Ltd. All rights reserved
Electric dipole transitions for 3d(6)4s-3d(6)4p in Mn I
No full textWe have calculated the logarithmic weighted oscillator strengths and transition probabilities (or rates) for 3d(6)4s-3d(6)4p electric dipole transitions in neutral manganese (Mn I, Z=25) by using two configuration interaction methods (the multiconfiguration Hartree-Fock (MCHF) method within the framework of Breit-Pauli relativistic corrections developed by Fischer and Cowan's relativistic Hartree-Fock (HFR) method). Results obtained have been compared with other calculations and experiments. (C) 2015 Elsevier Ltd. All rights reserved
M1 and E2 transitions in the ground-state configuration of atomic manganese
No full textUsing the multiconfiguration Hartree-Fock approximation within the framework of the Breit-Pauli Hamiltonian (MCHF+BP) and the relativistic Hartree-Fock (HFR) approximation, we have calculated the forbidden transition (M1 and E2) parameters such as transition energies, logarithmic weighted oscillator strengths and transition probabilities between the fine-structure levels in the ground-state configuration of 3d(5)4s(2) for atomic manganese (Mn I, Z=25). A discussion of these calculations for manganese using MCHF+BP and HFR methods is given here
Energies, Lande Factors, and Lifetimes for Some Excited Levels of Neutral Ytterbium (Z=70)
No full textWe have calculated relativistic energies, Lande factors, and lifetimes for some excited levels outside the core [Xe] in neutral ytterbium (Yb I, Z = 70) using two configuration interaction methods (multiconfiguration Hartree-Fock method within the framework of Breit-Pauli relativistic corrections developed by Fischer, and Cowan's relativistic Hartree-Fock method). Results obtained have been compared with other calculations and experiments
Energies and lifetimes for some excited levels in LaI
No full textWe calculated relativistic energies and Lande factors for 5d6s(2) 5d(2)6s, 5d(3), 5d6s7s, 4f6s6p, 5d6s6p, 5d(2)6p, and 4f5d6s levels in neutral lanthanum (Z = 57). We also obtained electric dipole transition energies and lifetimes for some excited levels. The calculations are based upon the multiconfiguration Hartree-Fock method within the framework Breit-Pauli relativistic corrections. Moreover, the results obtained were compared with other calculations and experiments
The level structure of atomic lutetium (Z=71): a relativistic Hartree-Fock calculation
No full textWe have calculated relativistic energies, Land, factors and lifetimes for 5d6s (2), 5d (2)6s, 6s (2) ns (n = 7-14), 6s (2) nd (n = 6-25), 6s (2) ng (n = 5-7), 6s (2) np (n = 6-25), 5d6s6p and 6s (2) nf (n = 5-23) excited levels outside the core [Xe]4f(14) in neutral lutetium (Z = 71) using Cowan's relativistic Hartree-Fock (HFR) method. The results obtained have been compared with other calculations and experiments
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