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

1954; American Institute of Physics; Volume: 93; Issue: 6 Linguagem: Inglês

10.1103/physrev.93.1232

1536-6065

Kiyoshi Murakawa,

History and advancements in chemistry

Using two samples that were enriched in ${\mathrm{Sb}}^{121}$ and ${\mathrm{Sb}}^{123}$, respectively, the hyperfine structure (hfs) of the spectrum of Sb ii was studied, and the quadrupole moments were determined to be $Q({\mathrm{Sb}}^{121})=(\ensuremath{-}0.52\ifmmode\pm\else\textpm\fi{}0.10)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}24}$ ${\mathrm{cm}}^{2}$, $Q({\mathrm{Sb}}^{123})=(\ensuremath{-}0.67\ifmmode\pm\else\textpm\fi{}0.10)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}24}$ ${\mathrm{cm}}^{2}$. Study of the hfs of the spectra of Sm i and Sm ii, using two samples enriched in ${\mathrm{Sm}}^{147}$ and ${\mathrm{Sm}}^{149}$, respectively, yielded the result that the nuclear spins of ${\mathrm{Sm}}^{147}$ and ${\mathrm{Sm}}^{149}$ are $\frac{7}{2}$ and their nuclear magnetic moments are $\ensuremath{\mu}({\mathrm{Sm}}^{147})=\ensuremath{-}0.76\ifmmode\pm\else\textpm\fi{}0.08$ nm and $\ensuremath{\mu}({\mathrm{Sm}}^{149})=\ensuremath{-}0.64\ifmmode\pm\else\textpm\fi{}0.06$ nm with $\frac{\ensuremath{\mu}({\mathrm{Sm}}^{147})}{\ensuremath{\mu}({\mathrm{Sm}}^{149})}=1.198\ifmmode\pm\else\textpm\fi{}0.015$. Using a sample containing 1.5 percent of ${\mathrm{Hg}}^{196}$, the hfs of the line Hg ii $\ensuremath{\lambda}6150$ was studied, and the existence of the ${\mathrm{Hg}}^{196}$ component was just observed. Shifts of the even isotopes in the lines Hg i $\ensuremath{\lambda}5461$, Hg i $\ensuremath{\lambda}6123$, and Hg iii $\ensuremath{\lambda}4797$ were measured, and it was found that they follow the regularity mentioned earlier. Using natural cadmium, the hfs of the line Cd ii $\ensuremath{\lambda}4415$ was studied, and the shift ${\mathrm{Cd}}^{114}$-${\mathrm{Cd}}^{116}$ was found to be anomalously small compared with the shift ${\mathrm{Cd}}^{112}$-${\mathrm{Cd}}^{114}$.