The 3d<sup>4</sup>-3d<sup>3</sup>4f transitions in Ni VII excited in vacuum spark and sliding spark sources and photographed with a high resolution were analyzed. Approximately 250 spectral lines were classified in the 127-158-Å wavelength region, and 134 energies of 3d<sup>3</sup>4f configuration were determined. The effects of interaction of the 3d<sup>4</sup>-3d<sup>3</sup>4f configuration with the 3p<sup>5</sup>3d<sup>5</sup> and 3d<sup>3</sup>5p configurations in Ni VII have been discussed. The parametric least-squares-fitting calculations by use of a Cowan computer code in the frame of Hartree-Fock method have confirmed the results of the present analysis.
© 2005 Optical Society of America
Rimma R. Kildiyarova, Sergey S. Churilov, Yogi N. Joshi, and Alexander N. Ryabtsev, "Analysis of the 3d34f configuration in Ni VII," J. Opt. Soc. Am. B 22, 884-897 (2005)