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Branching ratios for 3d 8 4p → 3d 8 4s lines of Ni II have been determined from measurements of emission-line intensities in an optically thin laser-produced plasma. The present values have been compared with the data available in the literature and are in good agreement. Calculations with intermediate coupling using Hartree-Fock wavefunctions have been carried out in order to place the experimental data on an absolute scale. The plasma parameters in different regions of the plasma plume have been measured and used to obtain further transition probabilities.

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To cite this version:C Aragón, P Vega, J A Aguilera. Stark width measurements of Fe II lines with wavelengths in the range 260300 nm. Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 2011, 44 (5) Abstract. The Stark widths of 21 Fe II lines with wavelengths in the range 260-300 nm have been measured using laser-induced plasmas as spectroscopic sources. A set of Fe-Cu samples has been employed to generate the plasmas. To reduce self-absorption, each line has been measured using a different sample, with an iron concentration determined by means of the curve-of-growth methodology. The remaining error due to self-absorption has been estimated as lower than 10 %. Different instants of the plasma evolution, from 0.84 µs to 2.5 µs are included in the measurements. The electron density, in the range (1.6-7.3)×10 17 cm -3 , is determined by the Stark broadening of the H line. Within this range, the Stark widths are found to be proportional to the electron density. The Boltzmann plot method is used to obtain the plasma temperature, which is in the range 12900-15200 K. The Stark widths obtained have been compared with available experimental and theoretical data.