We have carried out a 129 close-coupling level Dirac-Coulomb R-matrix calculation for the electron-impact excitation of Ni-like Xe. We have utilized this data to generate the spectral signature of Xe26+ in terms of feature photon-emissivity coefficients F-P ECs. We have compared these F-P ECs with those generated using semi-relativistic plane-wave Born excitation data, which forms the heavy species baseline for the Atomic Data and Analysis Structure (ADAS). We find that the Born-based F-P ECs give a reasonable qualitative description of the spectral signature but that, quantitatively, the R-matrix-based F-P ECs differ by up to a factor of 2. The spectral signature of heavy species is key to diagnosing hot plasmas such as will be found in the International Thermonuclear Experimental Reactor.
|Number of pages||12|
|Journal||Journal of Physics B: Atomic, Molecular and Optical Physics|
|Publication status||Published - 14 Dec 2004|
- spectral signature
Badnell, N. R., Berrington, K. A., Summers, H. P., O'Mullane, M. G., Whiteford, A. D., & Ballance, C. P. (2004). Electron-impact excitation of Xe26+ and its resultant spectral signature. Journal of Physics B: Atomic, Molecular and Optical Physics, 37(23), 4589-4601. https://doi.org/10.1088/0953-4075/37/23/002