Hyperfine Structure of Ionized Mercury Lines

Abstract

In connection with his investigations on the isotope shift in the band spectra of ionized mercury hydride, it has become necessary for Mrozowski to investigate the hyper¬fine structure of certain ionized mercury lines. He has re¬cently reported his results' regarding the analysis and the interpretation of the structure of some ionized mercury lines. Reference has been made by him to a short note in which the structure of X3984A had just been mentioned by Venkatesachar and myself ;2 but it is unfortunate that Mrozowski seems to be quite unaware of our subsequent detailed paper' on the Hyperfine structure of some HgII lines, in which the structures of XX3984, 2848 and 2262A had been investigated as early as in 1934. Mrozowski's results in regard to the structure as well as the scheme of hyperfine levels of the line X3984A agree with our earlier findings. Mrozowski, just like ourselves, has been unable to confirm the satellite at +1.950 cm-1 reported by Murakawas earlier, and it is now certain that no such satellite exists. The total spin separations of the two levels 6 2P3/ 2 and 5d9 6s2 2D512 given by Mrozowski agree with those previously determined by us and are consistent with theoretical expectations based on Goudsmit's formulae.' The scheme of hyperfine levels worked out by us for ex¬plaining the observed structure of the line is identical with the scheme proposed by Mrozowski; the agreement in the nuclear spin separations of the upper and lower levels.