| Autor: |
Podpaly, Y A, Gillaspy, J D, Reader, J, Ralchenko, Yu |
| Předmět: |
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| Zdroj: |
Journal of Physics B: Atomic, Molecular & Optical Physics; 5/15/2014, Vol. 47 Issue 9, p095702-095707, 6p |
| Abstrakt: |
We observed and analysed the extreme-ultraviolet spectra of highly charged ions of Kr XXI–Kr XXXIV produced in an electron beam ion trap (EBIT). The beam energies varied between 1.1 and 30�keV, and the wavelengths were observed between 3 and 17.3�nm with uncertainties of ∼0.003�nm. Six new lines were identified, and wavelength uncertainties have been improved for twelve additional transitions. It was found that a line intensity ratio for allowed transitions 3s23p–3s23d in Al-like Kr XXIV strongly deviated from predictions based on statistical weighting of the excited levels. Collisional-radiative modelling showed that this effect, which is due to the magnetic-dipole transition within the ground configuration 3s23p, offers sensitive diagnostics of electron density in the regime of interest to fusion tokamaks, EBITs, and other low-density plasmas. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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