Relativistic oscillator strengths for transitions in the principal spectral series of the silver isoelectronic sequence

Abstract

Abstract. in a very recent paper [1] we have reported oscillator strengths for fine structure transitions between levels belonging to the diffuse and sharp spectral series in the silver isoelectronic sequence. The calculations were performed with the quantum defect orbital method in both their non-relativistic (QDO) and relativistic (RQDO) formulations, with both implicit and explicit allowance for core-valence polarisation. We now present a parallel study of transitions belonging to the ns 2S-n' ZP(n = 5, 6; n' = 5-10) spectral series of the AgI sequence, up to Z = 63 in some cases.

Relativistic coupled-cluster calculations on hyperfine structures and electromagnetic transition amplitudes of In iii

“…The correlation effect decreases the transition amplitudes in all the cases except the transition 5s 2 S 1/2 → 6p 2 P 1/2 . We get correlation contribution is much larger than DF values for 5s 2 S 1/2 → 6p 2 P 1/2,3/2 transitions unlike to the other cases [33]. These have been also observed in velocity gauge calculations.…”

“…We have also observed distinct feature in the hyperfine anomaly parameters compare to neutral Indiun. a, g → Third-order Relativistic Many-Body Perturbation Theory (RMBPT): [30,51]; b → Core Polarized augmented Dirac-Fock method (DF+CP): [45]; c → Beam Foil technique : [29]; d → Beam Foil technique: [46]; e → Configuration Interaction calculation(CI): [31]; f → Relativistic Quantum Defect Orbital method(RQDO): [33]; a → Relativistic Hartree Fock (RHF): [32]; b → Beam Foil: [29]; c → RMBPT: [30]; d → Beam Foil: [46]; The transitions between levels are presented along x-axis and the transition probabilities are presented along yaxis, the levels are identified as 1: 5s…”

“…Also, the forbidden transitions are the effective decay mechanism in low density hot plasmas where the possibility of collisional de-excitation is low [26]. There have been many experimental and theoretical endeavor of estimating the strengths of some ultraviolet or visible lines of this ion over the years [27][28][29][30][31][32][33][34]. However, due to the large discrepancies among the results, it is required to have correlation exhaustive relativistic ab initio calculations.…”

Third-order relativistic many-body calculations of energies and lifetimes of levels along the silver isoelectronic sequence

“…Additionally, we evaluate lifetimes of excited states. Most earlier theoretical studies of Ag-like ions were devoted to oscillator strengths and lifetimes [5,6] rather than energy levels; an exception is the work of Cheng and Kim [7] in which energies, oscillator strengths and lifetimes of levels in Ag-like ions were calculated using relativistic Dirac-Fock (DF) wave functions [8]. In the present paper, we use RMBPT to determine energies and lifetimes of 4f j and 5l j levels in neutral Ag and Ag-like ions with Z = 48 − 100.…”

Atomic data for M1 and E2 emission lines in the potassium isoelectronic sequence

“…Martín et al , 1993Martín et al , 1994Martín et al , 1995Martín et al , 2000aCharro & Martín 1998;Charro et al 1997Charro et al , 2000. The RQDO formalism, is a simple but reliable analytical method based on a model Hamiltonian.…”