Hyperfine Structure in the Spectra of Sb, Sm, Hg, and Cd

Using two samples that were enriched in Sb¹²¹ and Sb¹²³, respectively, the hyperfine structure (hfs) of the spectrum of Sb ii was studied, and the quadrupole moments were determined to be Q(Sb¹²¹)=(-0.52±0.10)×10^-24 cm², Q(Sb¹²³)=(-0.67±0.10)×10^-24 cm². Study of the hfs of the spectra of Sm i and Sm ii, using two samples enriched in Sm¹⁴⁷ and Sm¹⁴⁹, respectively, yielded the result that the nuclear spins of Sm¹⁴⁷ and Sm¹⁴⁹ are 7/2 and their nuclear magnetic moments are μ(Sm¹⁴⁷)=-0.76±0.08 nm and μ(Sm¹⁴⁹)=-0.64±0.06 nm with μ(Sm¹⁴⁷)μ(Sm¹⁴⁹)=1.198±0.015. Using a sample containing 1.5 percent of Hg¹⁹⁶, the hfs of the line Hg ii λ6150 was studied, and the existence of the Hg¹⁹⁶ component was just observed. Shifts of the even isotopes in the lines Hg i λ5461, Hg i λ6123, and Hg iii λ4797 were measured, and it was found that they follow the regularity mentioned earlier. Using natural cadmium, the hfs of the line Cd ii λ4415 was studied, and the shift Cd¹¹⁴-Cd¹¹⁶ was found to be anomalously small compared with the shift Cd¹¹²-Cd¹¹⁴.