Hyperfine Structure, Isotope, and Isomer Shifts in Hg^193m, Hg^194, Hg^195m, and Hg^195—Comments on the Paper of Kleiman and Davis*

Abstract

An analysis has been made of the discrepancies between the hfs and isotope shift results for Hg194, Hg195, and Hg195m of Kleiman Davis [ J. Opt. Soc. Am.53, 822 ( 1963)] and our data, particularly in view of the importance of these results for our interpretation of the odd–even staggering effect in isotope shift [ W.J. T. H.H. S. , Phys. Rev. Letters8, 436 ( 1962)]. Our hfs results have been confirmed by the more precise level-crossing experiments of W. W. Smith [ Bull. Am. Phys. Soc.8, 9 ( 1963)]. Errors in the work of Kleiman and Davis have been attributed, in part, to the presence of Hg197 and Hg197m in their sources. Experimental results are shown for the Hg194 isotope shift. We find Hg194 − Hg196 isotope shift = 0.146 ± 0.010 cm−1, and a preliminary value Hg193m − Hg195m shift = 0.150 cm−1. These results lend further support to our hypothesis on the causes of odd–even staggering in isotope shift.