Measurement of absolute f-values for selected metals by the atomic beam method

Abstract

Previous experimental work has demonstrated that the use of an atomic beam apparatus in the measurement of absolute f-value is a valuable method from which reliable experimental results can be obtained. Changes and improvements were made in the apparatus, increasing its sensitivity and reliability; these modifications are described. A discussion of the validity of certain assumptions in the atomic beam theory is presented. A discussion is also presented of checks made on the reliability of the experimental measurements. Absolute f-value measurements were made on the stronger resonance lines of Cr I, Ga I, In I, Tl I, Pd I, and Sn I. The results of these measurements are presented and compared with those of other investigators. Suggestions are made for improvements in the atomic beam apparatus. These improvements would increase the number of elements whose absolute f-values could be measured by this method.