Abstract
We have recorded extreme ultraviolet spectra from to ions using a flat-field spectrometer installed at the Shanghai high-temperature superconducting electron-beam ion trap. The spectra were recorded at beam energies ranging between 200 and 400 eV and showed spectral lines and transition arrays in the 170–260 Å region. The charge states and spectra transitions were identified by comparison with calculations using a detailed relativistic configuration interaction method and collisional-radiative model, both incorporated in the flexible atomic code. Atomic structure calculations showed that the dominant emission arises from and transitions. The work also identified the ground-state configuration of as both theoretically and experimentally.
- Received 17 March 2015
DOI:https://doi.org/10.1103/PhysRevA.91.062501
©2015 American Physical Society