Leyla Özdemir

Energies and Landé factors for some excited levels in Lu I (Z = 71)

We have calculated relativistic energies and Landé factors for 5d6s2, 5d26s, 6s6p2, 6s27s, 5d3, 5d6s7s, 6s26p, 5d6s6p, 5d26p and 6s27p excited levels outside the core [Xe]4f14 in neutral lutetium (Lu I, Z = 71). These calculations are based on the multiconfiguration Hartree-Fock (MCHF) method, within the framework of the Breit-Pauli relativistic corrections. Moreover, the results obtained have been compared with other works.

Transition Parameters for Doubly Ionized Lanthanum

The transition parameters such as the wavelengths, weighted oscillator strengths, and transition probabilities (or rates) for the nd , nd , np , and ng electric dipole (E1) transitions of doubly ionized lanthanum (La III, ) 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.

Energies, Landé g-factors, and lifetimes for some excited levels of doubly ionized lanthanum

Using the relativistic Hartree-Fock (HFR) method developed by Cowan, we calculated the energy levels, Landé g-factors, and lifetimes for nd (n = 5–25), ns (n = 6–24), ng (n = 5–25), nf (n = 4–22), and np (n = 6–25) excited levels of doubly ionized lanthanum (La III, Z = 57). We compared the results with previously reported calculations and experiments.

Transition Energies of Ytterbium (Z=70)

Abstract Transition energies of neutral ytterbium (Yb I, Z = 70, belonging to the lanthanide series), including ionization potential, excitation energies, and electron affinity are calculated by the multiconfiguration Hartree-Fock (MCHF) method within the framework of the Breit-Pauli Hamiltonian and the relativistic Hartree-Fock (HFR) method. Ionization potential and excitation energies of Yb II and Yb III are also reported. The obtained results have been compared with other works.

Energy Levels and the Landé -Factors for Singly Ionized Lanthanum

We have calculated the energies and the Lande -factors for 5d2, 5d6s, 6s2, 4f6p, 5d7s, 5d6d, 4f2, 6p2, 6s6d, 6s7s, 4f6s, 4f5d, 5d6p, 6s6p, 4f7s, 4f6d, 5d7p, and 6s7p excited levels of singly ionized lanthanum (La II). These calculations have been carried out by using the multiconfiguration Hartree-Fock method within the framework of the Breit-Pauli Hamiltonian (MCHF

An Investigation on the Fine Structure Levels in the Ground State Configuration for the Antimony Anion

We have investigated the correlation, relativistic, and isotope shift effects on the fine structure levels in the ground state configuration for the antimony anion ( Sb-). Energies and radiative transition probabilities (for magnetic dipole, M1, and electric quadrupole, E2) have been obtained using the multiconfiguration Hartree-Fock method within the framework of the Breit-Pauli Hamiltonian. Therefore, the most important configuration interaction and relativistic effects have been included. Comparisons with other available works are presented. For some M1 and E2 lines the considered transition probabilities are reported for the first time

Forbidden Transitions in the Ground State Configuration of Doubly Ionized Argon

We have calculated forbidden transitions (M1 and E2) between fine structure levels in the ground state configuration 3s23p4 of doubly ionized argon (Ar III) using the multiconfiguration Hartree-Fock approach within the framework of the Breit-Pauli Hamiltonian. The data for the analysis of forbidden lines in the spectrum is important for the study of the plasma in astrophysical objects and fusion devices. The results obtained from this work have been compared with other results available in the literature.

Azot ve fosforun negatif iyonlarının temel hallerinin ince yapı seviyeleri

The fine structure levels for negative ions (anions) of nitrogen and phosphorus have been investigated using multiconfiguration Hartree-Fock method within the framework of Breit-Pauli Hamiltonian (MCHF+BP). Nitrogen and phosphorus have half-filled outer shell in ground state 1s2s 2p S and 1s2s 2p 3s 3p S, respectively. It has been stated in most works that the negative ion of nitrogen is instable whereas the negative ion of phosphorus is stable. The results obtained have been compared with other works.

Energies and Electric Dipole Transitions for Low-Lying Levels of Protactinium IV and Uranium V

We have reported a relativistic multiconfiguration Dirac-Fock (MCDF) study on low-lying level structures of protactinium IV (Z =91) and uranium V (Z =92) ions. Excitation energies and electric dipole (E1) transition parameters (wavelengths, oscillator strengths, and transition rates) for these low-lying levels have been given. We have also investigated the influence of the transverse Breit and quantum electrodynamic (QED) contributions besides correlation effects on the level structure. A comparison has been made with a few available data for these ions in the literature.

Relativistic Energy Calculations for Some Excited Levels in Neutral Silver

Relativistic energy calculations for some excited levels in neutral silver (Ag I, Z= 47) have been obtained using multiconfiguration Hartree‐Fock (MCHF) approximation. In table, results obtained have been compared with other calculations and experiments.