Multiplet Structure and Hyperfine Structure of the Spectrum of Mercury

抄録

Analysis of the spectrum of Hg I resulted in locating the level 5d⁹6s²6p ¹F₃ in the range 4392–4139 cm⁻¹ measured from the ionization limit or 79792–80045 cm⁻¹ measured from the normal state. The compositions of some levels of the configurations 5d⁹6s²6p and 5d¹⁰6s6p were calculated.
The hfs of some lines of the mercury spectrum was measured, using enriched isotope as well as natural mercury. The quadrupole moment of Hg²⁰¹ that was deduced from the hfs of 5d⁹6s²6p ¹D₂ is 0.43 barn (1 barn=10⁻²⁴ cm²), the shielding correction being neglected. If the correction is introduced, this becomes somewhat smaller, but is still in reasonable agreement with the value 0.4₂ barn that was published previously by the author. The agreement seems to indicate that the wave functions for the configuration 5d⁹6s²6p given in the present work are accurate enough for calculating the quadrupole moment. It is concluded that Q(Hg²⁰¹)=0.4₂ barn, the shielding correction being included.