O-shell emission of uranium in a high temperature, low density plasma
- Lawrence Livermore National Lab., CA (United States)
- Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Physics and Astronomy
We present models for the soft X ray emission spectra of UXXIV, UXXV, UXXX, UXXXI and UXXXII under tokamak conditions. The spectra are calculated from collisional-radiative models and cover the 60 to 200{Angstrom} range. A fully relativistic parametric potential code has been used for the ab initio atomic structure calculations, and electron impact excitation rates have been computed in the distorted wave approximation. The ions considered here display a range of spectroscopic phenomena to be found in the O-shell of heavy elements, that can be compared with experimental observations. These include the configuration interaction between 5s{sup 2}5p{sup 6}5d{sup k{minus}1}5f and 5s{sup 2}5p{sup 5}5d{sup k+1} in ions with 5s{sup 2}5p{sup 6}5d{sup k} ground configurations, represented by UXXIV (k=l); configuration interaction between 5s{sup 2}5p{sup k{minus}1}5d and 5s{sup 2}5p{sup k+l} in ions with 5s{sup 2}5p{sup k} ground configurations, such as UXXX (k=l); the unique system of satellite emission lines to the resonant 5s-5p transitions in UXXXII arising from highly metastable 4f{sup 13}5s{sup 2} levels; and the bright, isolated resonant lines associated with the closed shell UXXXI and systems.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10107987
- Report Number(s):
- UCRL-ID--115497; ON: DE94004281
- Country of Publication:
- United States
- Language:
- English
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