Revised Absolute ƒ-VALUES for λ3247 of Neutral Copper and λ3720 of Neutral Iron

Abstract

Recent atomic-beam measurements of absoluteJ-values for the resonance lines of neutral copper and iron yield values which are about 30 percent higher than atomic-beam values reported in the past. The new values are 0.43 for x3247 of Cu I and 0.041 for 3720 of Fe I. In the case of copper, the new value is in excellent agreement with recent measurements of lifetimes. In the case of iron, some discrepancies between results obtained by different investigations still exist. Nevertheless, the need for a 0.1-dex reduction in the Corliss and Tech absolute scale of log gJ-values for iron is indicated.