Hyperfine structures and isotopic shifts of uranium transitions using tunable laser spectroscopy of laser ablation plumes

Journal Article · Wed Jul 01 04:00:00 EDT 2020 · Spectrochimica Acta. Part B, Atomic Spectroscopy

DOI:https://doi.org/10.1016/j.sab.2020.105828· OSTI ID:1638018

Harilal, Sivanandan S. ^[1]; Murzyn, Christopher M. ^[2]; Phillips, Mark C. ^[3]; Martin, Jeffrey B. ^[2]

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1. BATTELLE (PACIFIC NW LAB)
2. Sandia National Laboratory
3. UNIVERSITY PROGRAMS

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.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1638018
• Report Number(s): PNNL-SA-149580
• Journal Information: Spectrochimica Acta. Part B, Atomic Spectroscopy, Journal Name: Spectrochimica Acta. Part B, Atomic Spectroscopy Vol. 169
• Country of Publication: United States
• Language: English

Related Subjects

(020.3260) Isotope shifts
(140.3440) Laser-induced breakdown
(280.4788) Optical Sensing
(280.5395) Plasma Diagnostics
(300.2140) Emission Spectroscopy
(300.2530) Fluorescence
laser absorption spectroscopy