Opt Lett. 2018 Oct 15;43(20):5118-5121. doi: 10.1364/OL.43.005118.
We use a spatially and temporally resolved emission tracking technique based on optical emission spectroscopy to map the evolution of emission features from uranium and its compounds in a plasma produced by a nanosecond laser. We observe quenching of the emission from neutral uranium (591.538 nm) and uranium monoxide (593.55 nm) species with increasing oxygen concentration and discuss possible reaction pathways for dissociation or formation of higher uranium oxides (UO). We further identify spectral features between 320 nm and 380 nm and between 520 nm and 640 nm, which we attribute to UO.
我们使用一种基于光谱发射技术的空间和时间分辨发射跟踪技术，来绘制纳秒激光产生的等离子体中铀及其化合物发射特征的演化。我们观察到随着氧浓度的增加，中性铀（591.538nm）和一价铀（593.55nm）物种的发射猝灭，并讨论了可能的反应途径，这些反应途径涉及更高价铀氧化物（UO）的解离或形成。我们进一步确定了 320nm 到 380nm 之间以及 520nm 到 640nm 之间的光谱特征，我们将其归因于 UO。
