We report isotopic shifts and hyperfine structures of selected U transitions employing tunable spectroscopy viz: laser-induced fluorescence and laser absorption spectroscopy of laser ablation plumes. The laser-produced plasmas were produced during ns laser ablation on a natural U metal which contains 0.7% 235U. Our results show that isotopic shifts between 238U and 235U are entangled with hyperfine structures of 235U. The isotopic ratio obtained using laser-induced fluorescence is affected by optical saturation effect. Time-resolved laser absorption spectroscopy is carried out for evaluating the optical absorption and estimating the hyperfine constants.
Revised: July 10, 2020 |
Published: July 1, 2020
Citation
Harilal S.S., C.M. Murzyn, M.C. Phillips, and J.B. Martin. 2020.Hyperfine structures and isotopic shifts of uranium transitions using tunable laser spectroscopy of laser ablation plumes.Spectrochimica Acta. Part B, Atomic Spectroscopy 169.PNNL-SA-149580.doi:10.1016/j.sab.2020.105828