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Analysis of EUV spectra from N-shell tungsten ions observed with an electron beam ion trap

  • Tapasi Das
  • Yuri A. Podpaly
  • Joseph Reader
  • John D. Gillaspy
  • Yuri Ralchenko
Regular Article
  • 42 Downloads

Abstract

Extreme ultraviolet spectra of highly charged tungsten ions were produced with an electron beam ion trap at the National Institute of Standards and Technology and recorded with a flat-field grazing-incidence spectrometer. The spectra were measured in the wavelength range 2.7–17.3 nm while the beam energy varied between 1.65 and 2.00 keV. At these energies, the ionization stages from Zr-like W34+ to Se-like W40+ ions were observed. Large-scale collisional-radiative modelling was used to identify the strong lines, including 15 new ones, which represent electric dipole n = 4–4 transitions in these ions. While a good quantitative agreement between theoretical and experimental data was found for almost all ions, some of the tentatively identified wavelengths in W35+ significantly disagree from all available calculations.

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Keywords

Atomic Physics 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.National Institute of Standards and TechnologyGaithersburgUSA

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