Energy spectra of the tungsten ion 4s²4p^N, 4s²4^N–14d and 4s4p^N+1 configurations

Abstract

The ab initio quasirelativistic Hartree-Fock approximation was used to determine spectroscopic parameters for the multicharged tungsten ions with an open 4p shell. The configuration interaction method based on the transformed radial orbitals was applied to include the electron-correlation effects. The relativistic effects were taken into account in the Breit-Pauli approximation for the quasirelativistic Hartree-Fock radial orbitals. The complete energy level spectra were calculated for the 4s

Radiative transitions for three lowest configurations of tungsten ions W38+–W43+

“…The calculated level energies, their radiative lifetimes t, and other spectroscopic parameters of the levels are presented in Table 1. Meanwhile, a comprehensive comparison with available experimental data and with level energies determined using other theoretical methods was performed and the accuracy assessment was given elsewhere [13].…”

“…The determined level energies for each tungsten ion were consistently compared to the existing experimental data and available calculations from other authors in [13]. It was concluded there that the accuracy of the QR level energies is no worse than that of other calculations.…”

“…These methods were applied in all our previous investigations. The utilization of this meth od for the investigated tungsten ions and specific calculation details are widely discussed in [13]. The explicit numbers of the constructed admixed configurations and generated CSFs for each investigated ion are also listed there.…”

“…Since the adopted approximation completely matches that described in [13], we provide only a brief summary of our method here. The produced data and their accuracy assessment are discussed in Section 3 where our results are compared with available experimental data and theoretical data from other authors.…”

“…This work presents a complete set of the spectroscopic parameters determined using the same theoretical approach for each investigated ion. The level energies for such ions determined in the QR approach are presented in [13]. That work contains the overview of various studies of the tungsten ions and the comparison of our QR results with available data [8,11,12,[14][15][16][17][18][19].…”