Ratios of Relative Abundance, Magnetic Moments, and Capture Cross Sections of Gadolinium Isotopes from Paramagnetic Resonance Spectrum

Abstract

Precision measurements on the hyperfine structure of the transitions corresponding to $\Delta M=4\mathrm{}$ of the cubic-field paramagnetic resonance spectrum of gadolinium in single crystals of thorium oxide yield the following values: isotopic abundance: even isotopes, 69.45%; ${\mathrm{Gd}}^{155}$, 15.05±0.2%; ${\mathrm{Gd}}^{157}$, 15.5±0.2%. Ratio of magnetic moments: $\frac{{\mu }^{155}}{{\mu }^{157}}=0.7495\mathrm{}\pm 0.0045$.