Abstract
The spectrum of Au I and Au II has been examined for hyperfine structure in the region . Splitting has been observed in more than eight lines of the spectrum of Au I, whereas the hyperfine structure of Au II lines could not be resolved. From the four-component structure of the lines and it is shown that the mechanical moment of the gold nucleus is (3/2) (). The effect of self-reversal in the resonance lines has been investigated and eliminated. The magnetic moment determined from the splitting of the unreversed resonance line is found to be 0.195 proton-magneton. No other determination of the magnetic moment is at present possible because of the intermediate coupling shown to exist in the complex electronic configurations of Au I and the inadequacies of the present theory of hyperfine structure. The splitting of the level is estimated and found to be in approximate agreement with that calculated from the level. No indication of any abnormally large separation or of any isotope shift has been found.
- Received 4 August 1938
DOI:https://doi.org/10.1103/PhysRev.55.170
©1939 American Physical Society