Ni I oscillator strengths

Oscillator strengths of 150 Ni I lines in the spectral range 2800–6200 Å have been obtained by emission and from hook measurements. Relative sets of ?-values were determined by combining emission measurements on a hollow cathode with hook measurements in a high-temperature furnace. No assumption concerning the plasma state is used, and no temperature determination is required. The relative measurements have been placed on an absolute scale by using lifetime data. The uncertainty of the ?-values is 13% on average. Comparisons are made with the results of other authors.