X-Ray Isotope Shifts and Variations of Nuclear Charge Radii in Isotopes of Nd, Sm, Dy, Yb, and Pb

Abstract

Isotope shifts of electronic $K\ensuremath{\alpha}$ x-ray transitions have been measured in isotopes of Nd, Sm, Dy, Yb, and Pb using a curved crystal spectrometer. The $\ensuremath{\delta}〈{r}^{2}〉$ values of the nuclear charge distribution, as derived from the data, are presented. A combination with results from optical isotope shifts yields an improved accuracy for $\ensuremath{\delta}〈{r}^{2}〉$. The optical mass shifts and the electronic coefficients can also be obtained. A comparison with muonic x-ray isotope shifts is presented for Nd and Pb. Consistancy between electronic and muonic data is noted.