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首页> 外文会议>Conference on Laser Applications to Chemical and Environmental Analysis, Feb 11-13, 2000, Santa Fe, New Mexico >Laser spectroscopy of Magnesium Oxide in Magnesium metal combustion
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Laser spectroscopy of Magnesium Oxide in Magnesium metal combustion

机译：镁金属燃烧中氧化镁的激光光谱

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The excitation spectrum of MgO reveals a dense and complex structure with many active states. The most dominant feature of the spectrum is the (0,0) bandhead at 606 nm. The R, P, and Q branches trail to the blue, overlapping with (1,1) transitions at 601 nm and the (2,2) band at 594 nm. TheΔv=-l vibrational bands, (0,1), (1,2), and (2,3) were also present due to the high temperature in the flame. The probable beginning of another set of lines, most likely fromΔv=-2 vibrational transitions, appear at the far right in Fig. 2. This work is an improvement over the only previous seeded flame study of MgO. Pasternack et al. seeded an acetylene flame with magnesium chloride and performed excitation scans of the B~1Σ~+A~1 II transition with a 0.25 cm~(-1) bandwidth laser. In their work, individual transitions were not well resolved, with distinct lines not emerging until 3 nm from the (0,0) bandhead, in this work, the comparable dimension is less than 0.5 nm. Pasternack et al. also failed to observe theΔv=-l vibrational bands, this may have been a simple oversight in that they did not probe to the red of the (0,0) bandhead. The excitation scans are of sufficient quality, high signal-to-noise ratio and resolution, to accurately locate a large number of line positions. These data have been used to derive spectroscopic constants of the MgO A~1II state.
机译：MgO的激发光谱显示出具有许多活跃状态的致密且复杂的结构。光谱的最主要特征是在606 nm处的（0,0）带头。 R，P和Q分支尾随蓝色，与601 nm处的（1,1）跃迁和594 nm处的（2,2）谱带重叠。由于火焰中的高温，也存在Δv＝ -1振动带（0，1），（1，2）和（2，3）。图2的最右边出现了另一组线的可能开始，最有可能来自Δv= -2振动跃迁。这项工作是对以前唯一的MgO火焰研究的改进。 Pasternack等。用氯化镁播种乙炔火焰，并用带宽为0.25 cm〜（-1）的激光对B〜1Σ〜+ A〜1 II跃迁进行激发扫描。在他们的工作中，单个跃迁没有得到很好的解决，直到（0,0）带头3 nm处才出现明显的线条，在这项工作中，可比尺寸小于0.5 nm。 Pasternack等。也没有观察到Δv＝ -1的振动带，这可能是简单的疏忽，因为它们没有探测到（0，0）带头的红色。激发扫描具有足够的质量，高的信噪比和分辨率，可以准确地定位大量的线位置。这些数据已被用于推导MgO A〜1II状态的光谱常数。

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