Evolution of uranium monoxide in femtosecond laser-induced uranium plasmas

被引：50
作者：
Hartig, Kyle C. [1 ,2 ,5 ]
Harilal, Sivanandan S. [2 ]
Phillips, Mark C. [2 ]
Brumfield, Brian E. [2 ]
Jovanovic, Igor [3 ,4 ]
机构：
[1] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA
[2] Pacific Northwest Natl Lab, Richland, WA 99352 USA
[3] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA
[4] Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA
[5] Univ Florida, Nucl Engn Program, Gainesville, FL 32611 USA
来源：
OPTICS EXPRESS | 2017年 / 25卷 / 10期
关键词：
INDUCED BREAKDOWN SPECTROSCOPY; BORON ISOTOPIC RATIO; ABLATION PLASMAS; EMISSION FEATURES; INFRARED-SPECTRA; ENERGY-LEVELS; LIBS; NANOSECOND; SPECTROMETRY; PERFORMANCE;
D O I：
10.1364/OE.25.011477
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report on the observation of uranium monoxide (UO) emission following fs laser ablation (LA) of a uranium metal sample. The formation and evolution of the molecular emission is studied under various ambient air pressures. Observation of UO emission spectra at a rarefied residual air pressure of similar to 1 Torr indicates that the UO molecule is readily formed in the expanding plasma with trace concentrations of oxygen present within the vacuum chamber. The persistence of the UO emission exceeded that of the atomic emission; however, the molecular emission was delayed in time compared to the atomic emission due to the necessary cooling and expansion of the plasma before the UO molecules can form. (C) 2017 Optical Society of America
引用
收藏
页码：11477 / 11490
页数：14
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