Electron-beam ion-trap spectra of tungsten in the EUV

Abstract

At the Livermore electron-beam ion-trap facility, extreme-ultraviolet spectra of tungsten have been recorded in the wavelength range 40–85 Å. The electron-beam energy was varied systematically to identify the individual spectra of Rb-like W37+ to Cu-like W45+. About 60 spectral features have been identified. PACS Nos.: 32.30Rj, 39.30+w, 31.50+w

Soft-X-ray spectra of highly charged Os, Bi, Th, and U ions in an electron beam ion trap

“…We have now utilized the new spectrometer to observe line emission from charge states lower than nickel-like. The new spectra compare in range of charge states to our earlier measurements on the EUV spectra of tungsten (W, Z=74) [9] (which has also been studied at the Berlin electron beam ion trap [10,11]) and gold (Au, Z=79) [12]. In both cases, the spectral data related to ion species of Rb-to Cu-like isoelectronic sequences.…”

Quasirelativistic calculation of 4s24p5, 4s24p44d and 4s4p6configuration spectroscopic parameters for the W39+ion

“…During the investigation of the multicharged tungsten ions in [16,17] we have noticed that the radiative lifetimes τ of some metastable levels can be affected by the M2 and E3 transitions to the ground configurations -not only by the M1 and E2 transitions among the levels of the excited configurations. Therefore we also have calculated such M SD [29] 73 164 276 75 M SD [22] 103 202 298 97 M SD [25] 82 206 259 73…”

“…The experimental electron-beam-ion-trap (EBIT) measurements for the multicharged ions with an open 4p shell were reported in [22]. There authors employed theoretical data from [23] for the line identification.…”

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

“…In a similar way, the spectroscopic parameters of the W 39+ ion with the ground configuration 4s 2 4p 5 were determined and their accuracy was assessed in our previous work [7]. In that study the level energies and radiative transition parameters were calculated and compared with available experimental [8][9][10] and theoretical data from other sources [9,11,12].…”