Nuclear Magnetic Resonance in Thallium Compounds

Abstract

A precision, resonance absorption measurement has been made of the ratio of the magnetic moments of ${\mathrm{Tl}}^{205}$ and ${\mathrm{Tl}}^{203}$. The experimental ratio is $\frac{{\mu }^{205}}{{\mu }^{203}}=1.009838\mathrm{}\pm 0.000001$. This result, when compared with the value observed by Berman for the ratio of hyperfine structure separations in the ${}_{}{}^2{}_{}{}^{}P_{\frac{1}{2}}^{}{}_{}{}^{}$ state, $\frac{\Delta {\nu }^{205}}{\Delta {\nu }^{203}}=1.00974\mathrm{}\pm 0.00003$, establishes the reality of effects attributable to the finite nuclear size.