Abstract
A survey has been made of electron-capturing nuclides produced by irradiating rare earths (Gd through Hf) of various isotopic enrichments with 22-Mev protons. Ion-exchange chemistry was performed, conversion-electron spectra were analyzed, and the various activities were cataloged. At least ten new activities, , , , , , , , , , and were found and studied. Eighteen previously known activities also were examined. Multipolarities consistent with the observed conversion electron intensity ratios are proposed. The positions of levels of even-even nuclei as a function of both proton and neutron number are discussed.
- Received 21 June 1957
DOI:https://doi.org/10.1103/PhysRev.108.989
©1957 American Physical Society