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

被引：33

作者：

Harilal, S. S. ^{[1
]}

Murzyn, C. M. ^{[2
]}

Phillips, M. C. ^{[3
,4
]}

Martin, J. B. ^{[2
]}

机构：

[1] Pacific Northwest Natl Lab, Richland, WA 99352 USA

[2] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA

[3] Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA

[4] Opticslah LLC, Albuquerque, NM 87106 USA

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2020年 / 169卷

关键词：

Laser ablation; Laser-induced fluorescence; Laser absorption spectroscopy; LIBS; Tunable laser spectroscopy; Isotopic analysis; Hyperfine structure; Uranium; INDUCED BREAKDOWN SPECTROSCOPY; FLUORESCENCE SPECTROSCOPY; ABSORPTION-SPECTROSCOPY; SOLID SAMPLES; U-235; EMISSION; SOIL;

D O I：

10.1016/j.sab.2020.105828

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

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 plasmas were produced during ns laser ablation on a natural U metal target which contains 0.73% U-235. Our results show that isotopic shifts between U-238 and U-235 are entangled with hyperfine structures of U-235. Measurements obtained using laser-induced fluorescence are affected by the high absorbance of U-238. Time-resolved laser absorption spectroscopy is carried out for evaluating the optical absorption and estimating the hyperfine constants.

引用

页数：8