Quantum-defect studies of transitions in the diffuse spectral series of the potassium isoelectronic sequence (original) (raw)

Photoionization of the potassium isoelectronic sequence: Ca + and transition metal ions

2010

Photoionization cross section calculations are performed for the ground ([Ne]3s 2 3p 6 3d 2 D e 2 / 3 ) and the first two excited ([Ne]3s 2 3p 6 3d 2 D e 2 / 5 and [Ne]3s 2 3p 6 4s 2 S e 2 / 1 ) states of potassium-like transition metal ions (Sc +2 , Ti +3 , V +4 , Cr +5 , Mn +6 , Fe +7 ), along with photoionization calculations for K-like Ca + ions in the ground ([Ne]3s 2 3p 6 4s 2 S e 2 / 1 ) state and the first two excited ([Ne]3s 2 3p 6 3d 2 D e 2 / 3 and [Ne]3s 2 3p 6 3d 2 D e 2 / 5 ) states. The discrete N-electron final state ion system orbitals are generated using the computer program AUTOSTRUCTURE; 24 configurations are included in the configurationinteraction (CI) calculation for transition metal ions, and 30 configurations for the case of Ca + ions. The initial and final (N+1)-electron wavefunctions are generated using Rmatrix along with photoionization cross sections. In addition to the non-relativistic (LScoupling) R-matrix, we have used the relativistic (Breit-Pauli) R...

Energy systematics of the KαL i satellite transitions

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, 1999

The presence of X-ray satellites is common in X-ray spectra. The last compilation of satellite lines, frequently cited in the open literature, is the X-ray energy collection of Cauchois and Senemaud, Wavelengths of X-ray Emission Lines and Absorption Edges, Pergamon, Oxford, 1978 [1], which is restricted to electron and photon excitations. In the last decades, many ion-induced satellite measurements have been performed, the range covered in Ref. [1] have been extended for ∼40 < Z < 92, spectator vacancy number from 2 to 7, and energy-shifts from ∼200 to 1200 eV. In analytical work and in basic atomic physics research one needs the best data available on the satellite lines. We are working on a new and comprehensive compilation of experimental values for the K-satellite, and K-hypersatellite energy shifts. Some problems encountered during this work are discussed. A new semi-empirical formula for the description of the KαLi satellite energy shifts is given.