Hyperfine Structure and Isotope Shift in the Spectrum of Tellurium

Using separated isotopes of tellurium, the hyperfine structure of the Te I and Te II spectra was studied. The magnetic moments of the two odd isotopes were calculated to be $\mu \left({\mathrm{Te}}^{125}\right)=-0.6\mathrm{}\pm 0.2$ nm, $\mu \left({\mathrm{Te}}^{123}\right)=-0.5\mathrm{}\pm 0.2$ nm. The ratio of the magnetic moments was determined to be $\frac{{\mu }^{125}}{{\mu }^{123}}=1.186\mathrm{}\pm 0.007$. Anomalous shift of the even isotopes was detected in the lines $\lambda 4006 (5s5\mathrm{}{p}^4{}_{}{}^4{}_{}{}^{}P_{\frac{5}{2}}^{}{}_{}{}^{}-5\mathrm{}{p}^2({}_{}{}^3{}_{}{}^{}P_0^{}{}_{}{}^{}\left)6\mathrm{}{p}_{\frac{3}{2}}\right)$ and $\lambda 4049 (5s5\mathrm{}{p}^4{}_{}{}^4{}_{}{}^{}P_{\frac{3}{2}}^{}{}_{}{}^{}-{\left[5\mathrm{}{p}^2\right({}_{}{}^3{}_{}{}^{}P_1^{}{}_{}{}^{}\left)6p\right]}_{\frac{3}{2}})$. The spacings between consecutive even isotopes in the line $\lambda 4006$ were as follows: $\Delta \mathrm{}(130-128)=0.014\mathrm{}$, $\Delta \mathrm{}(128-126)=0.011\mathrm{}$, $\Delta \mathrm{}(126-124)=0.026\mathrm{}$, $\Delta \mathrm{}(124-122)=0.017\mathrm{}$, $\Delta \mathrm{}(122-120)=0.017\mathrm{}$ ${\mathrm{cm}}^{-1\mathrm{}}$, the component due to the heaviest isotope lying on the largest frequency side. The centers of gravity of the odd isotopes in the line $\lambda 4006$ were: $\Delta \mathrm{}(124-125)=0.002\mathrm{}$, $\Delta \mathrm{}(123-122)=0.000\mathrm{}$ ${\mathrm{cm}}^{-1\mathrm{}}$. $\lambda 4049$ showed nearly the same isotope effect as $\lambda 4006$. Regarding the $\mu$ values, see the note §.