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

Abstract

The ab initio quasirelativistic approximation was used to derive transition data for the multicharged tungsten ions W 38+ -W43+ with an open 4p shell. The configuration interaction method with transformed radial orbitals was applied to include electron correlation effects. The relativistic effects were taken into account in the Breit-Pauli approximation for the quasirelativistic Hartree-Fock radial orbitals. The level energies E, radiative lifetimes τ, and Landé g-factors were calculated for the 4s 4d, and 4s4pN+1 configurations of six tungsten ions. The radiative transition wavelengths λ, spontaneous emission transition probabilities A and their uncertainties for the electric dipole, electric quadrupole, electric octupole, magnetic dipole and magnetic quadrupole transitions among the levels of these configurations are presented.

Atomic structure and excitation cross section by electron impact of tungsten ions, W38+

“…Gaigalas et al [16] have performed multiconfiguration Dirac-Hartree-Fock calculations of energy levels, wave function composition, and radiative rates of all atomic states of 4p 6 and 4p 5 4d in + W 38 . The highly charged tungsten ions, + W 29 through + W 43 , have been investigated using a multiconfiguration Dirac-Fock (MCDF) approach, the energy levels and radiative rates of electronic quadrupole (E2) and magnetic dipole (M1) transitions have been obtained [17].…”

Collisional-radiative modeling for the EUV spectrum of W40+-W42+ions

“…However, our calculation results for W 40+ exhibit relatively large differences from those calculated by Karpuškienė et al using the quasi-relativistic approach [28] and by Fournier using the RELAC code [29], with maximum deviations of 2.206% and 1.735%, respectively. Similarly, maximum differences between our results for W 41+ and those calculated by Karpuškienė et al using the quasi-relativistic approach [28] and by Wang et al using the MCDF method [33] are 1.792% and 2.073%, respectively. For W 42+ , maximum differences between our results and those calculated by Karpuškienė et al using the quasi-relativistic approach [28] and by Fournier using the RELAC code [29] are 1.540% and 1.957%, respectively.…”

“…The calculated transition wavelengths of W 40+ -W 42+ ions are in good agreement with results from EBIT experiments [10,11], Tokamak experiments [5,8], and MCDF calculations [30,32]. However, our calculation results for W 40+ exhibit relatively large differences from those calculated by Karpuškienė et al using the quasi-relativistic approach [28] and by Fournier using the RELAC code [29], with maximum deviations of 2.206% and 1.735%, respectively. Similarly, maximum differences between our results for W 41+ and those calculated by Karpuškienė et al using the quasi-relativistic approach [28] and by Wang et al using the MCDF method [33] are 1.792% and 2.073%, respectively.…”

“…Similarly, maximum differences between our results for W 41+ and those calculated by Karpuškienė et al using the quasi-relativistic approach [28] and by Wang et al using the MCDF method [33] are 1.792% and 2.073%, respectively. For W 42+ , maximum differences between our results and those calculated by Karpuškienė et al using the quasi-relativistic approach [28] and by Fournier using the RELAC code [29] are 1.540% and 1.957%, respectively. These discrepancies may arise from different treatment of relativistic and electron correlation effects in previous studies [28], and the selection of empirical potentials [29].…”

“…For W 42+ , maximum differences between our results and those calculated by Karpuškienė et al using the quasi-relativistic approach [28] and by Fournier using the RELAC code [29] are 1.540% and 1.957%, respectively. These discrepancies may arise from different treatment of relativistic and electron correlation effects in previous studies [28], and the selection of empirical potentials [29].…”