Precision measurement of relative oscillator strengths - VIII. Measures of Fe I transitions from levels a3F2-4 (1.49-1.61 eV) with an accuracy of 1 per cent

Abstract

Measurements of relative oscillator strengths are given for 26 lines of Fe I with excitation energies between 1.49 and 1.61 eV. The measurements have been made in absorption using the Oxford technique, and have an accuracy of 0.004 dex (1 per cent). The decrease in accuracy over previous measurements in this series (0.5 per cent) arises from a need to economize in electricity consumption. Absolute values with an accuracy of 0.012 dex (2.8 per cent) are also given assuming that log gf (371.994) = – 0.43 ± 0.01. The effect of damping on the method of measurement is discussed. Comparisons are made with the calculated values of Kurucz & Peytremann, the results of other experimenters and the compilation of Foy.