Isotopic variations of Sm, Gd, Er and Yb found in planetary materials caused by neutron-capture reactions in natureOPEN ACCESS
Hiroshi Hidaka Journal of Analytical Science and TechnologyVolume 15, article number 14 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “The isotopic shifts of 149Sm–150Sm and 157Gd–158Gd have often been observed in meteorites and lunar surface materials, because…