Relativistic atomic data for Cu-like tungsten

Abstract

Energy levels, radiative transition probabilities, and autoionization rates for [Ne]3s 2 3p 6 3d 9 4l nl, [Ne]3s 2 3p 5 3d 10 4l nl (n = 4-6), and [Ne]3s 2 3p 6 3d 9 5l nl (n = 5-7) states in Cu-like tungsten (W 45+ ) are calculated using the relativistic many-body perturbation theory method (RMBPT code), the multiconfiguration relativistic Hebrew University Lawrence Livermore Atomic Code (HULLAC), and the Hartree-Fock relativistic method (COWAN code). Autoionizing levels above the [Ne]3s 2 3p 6 3d 10 threshold are considered. It is found that configuration mixing among [Ne]3s 2 3p 6 3d 9 4l nl and [Ne]3s 2 3p 5 3d 10 4l nl plays an important role for all atomic characteristics. Branching ratios relative to the first threshold and intensity factors are calculated for satellite lines, and dielectronic recombination (DR) rate coefficients are determined for the singly excited [Ne]3s 2 3p 6 3d 10 nl (n = 5-7) as well as doubly excited, nonautoionizing [Ne]3s 2 3p 6 3d 9 4s4l (l = s,p,d,f ), [Ne]3s 2 3p 6 3d 9 4p4l (l = p,d,f ), [Ne]3s 2 3p 6 3d 9 4d 2 , [Ne]3s 2 3p 5 3d 10 4s4l (l = s,p,d), and [Ne]3s 2 3p 5 3d 10 4p 2 states in Cu-like W 45+ ions. Contributions from the autoionizing doubly excited [Ne]3s 2 3p 6 3d 9 4l nl, [Ne]3s 2 3p 5 3d 10 4l nl, and [Ne]3s 2 3p 6 3d 9 5l nl states (with n up to 500), which are particulary important for calculating total DR rates, are estimated. Synthetic dielectronic satellite spectra from Cu-like W are simulated in a broad spectral range from 3 to 70Å. These calculations provide highly accurate values for a number of W 45+ properties useful for a variety of applications, including fusion applications.

Photoelectron spectra after multiphoton ionization of Li atoms in the one-photon Rabi-flopping regime

“…The same is also true for the corresponding transition dipole matrix elements presented in Table II. They show excellent agreement with the matrix elements obtained by the precision linearized coupled-cluster method [38].…”

R-matrix calculations of photoionization cross section of Ne-like tungsten

“…For atomic theory, highly charged tungsten ions are important because of quantum electrodynamics and relativity effects on atomic structure. A lot of research work has been performed on tungsten ions [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. Recently, measurements were reported by Beiersdorfer et al [39] of L-shell X-ray emission spectra for Ne-like W 64+ ions.…”

Atomic structure calculations and study of EUV and SXR spectral lines in Cu-like ions

“…Further, Sansonetti et al [44] provided the transition data with energy levels for Ba XXVIII and other barium ions. Safronova et al [45] presented the energy levels, transition wavelengths along with weighted oscillator strengths and transition probabilities for W 45+ by applying Cowan code and RMBPT. Suzuki et al [46] have observed EUV spectra for highly ionized Gd and Nd ions including Cu-like Gd and Nd by solid pellet injection in Large Helical device (LHD) plasmas.…”

“…Wavelengths (Å) of SXR Nα strong transitions 4-13, 5-14, 6-15 and 7-16 for Cu-like ions: predicted wavelength (λ p ) and theoretical and experimental wavelength (λ c ), atomic number (Z).References: a-[26],e-[54], f-[10], l-[44], m-[43], n-[40], o-[24], q-[42], r-[45], s-[25] , t-[57], u-[27], v-[58], w-[59], y-[60].Table 9. Moseley's parameters K and σ for Nα strong transitions of Cu-like ions.…”