Rodolfa Kit T, Cremers David A
Nuclear Materials Management Division, Group NMT-15, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Appl Spectrosc. 2004 Apr;58(4):367-75. doi: 10.1366/000370204773580185.
An apparatus has been investigated based on laser-induced breakdown spectroscopy (LIBS) for the rapid determination of the spatial distribution of elements on surfaces. Cylindrical optics are used to create a linear spark approximately 1 cm in length. Light emitted by atoms excited along the spark is collected and provides a spatial profile of elemental composition in the sample when analyzed with a spectrometer and gated charge-coupled device (ICCD) detector. Moving the spark across the sample surface as spectral data is recorded at regularly spaced intervals allows for the development of a three-dimensional elemental distribution map (emission intensity versus spatial distribution across an area). An analysis of the spatial resolution of this methodology is presented along with representative data from several sample types. Application of full-image analysis allowing for simultaneous investigations into the spatial distributions of multiple elements is also discussed and results are presented.
已对一种基于激光诱导击穿光谱法（LIBS）的装置进行了研究，用于快速测定表面元素的空间分布。采用柱面光学元件来产生长度约为1厘米的线性火花。沿着火花激发的原子所发射的光被收集起来，当用光谱仪和门控电荷耦合器件（ICCD）探测器进行分析时，可提供样品中元素组成的空间分布情况。在以规则间隔记录光谱数据时，将火花在样品表面移动，这样就能绘制出三维元素分布图（发射强度与某一区域内空间分布的关系图）。本文介绍了该方法的空间分辨率分析以及来自几种样品类型的代表性数据。还讨论了全图像分析的应用，该分析可同时研究多种元素的空间分布，并给出了结果。
