Precision measurement of relative oscillator strengths. - VI. Measures of Fe I transitions from levels a5 F1 - 5 (0.86-1.01 eV) with an accuracy of 0.5 per cent

Abstract

Measurements of relative oscillator strengths are given for 68 lines of Fe I with excitation potentials between 0.86 and 1.01 eV; these include weak transitions with oscillator strengths down to $$\text {log}\enspace gf = -\enspace 5.013$$. The measurements have been made in absorption using the Oxford method, with an accuracy of 0.002 dex (0.5 per cent). Absolute values with an accuracy of 0.011 dex (2.6 per cent) are also given assuming that $$\text {log}\enspace gf\enspace (371.994) = -\enspace 0.43 \pm 0.01$$. Comparisons are made with the calculated values of Kurucz & Peytremann, the compilation of Foy and the results of other experimenters.