Abstract

The hyperfine structure (hfs) of three 235U high-lying levels has been measured by using a hollow-cathode lamp and laser-induced fluorescence technique. These transitions are from the first excited states at 16900 and 16505 cm-1 to the higher excited states. From the measured spectra, the isotope shifts and hfs widths for these levels are determined, and the hfs constants A and B for two levels are obtained.

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