ISOTOPIC DISPLACEMENTS IN THE SPECTRUM OF URANIUM

A systematic study of the isotopic displacement in the arc spectrum of uranium is being made, rome of the results obtained are given. The spectrum was studied with a Fabry-Perot recording spectrometer with a hollow liquid nitrogen, neon, or argon source. The uranium was in the form of UO/sub 3/, usually enriched 21% in U/sup 235/. The isotopic displacements are tabulated in millikaysers (10/sup -3/ cm/sup -1/). From the results obtained some observations were made on the electronic configurations of the odd terms, (J.S.R.)