Here, we discuss the merits of non‐destructive UV laser‐induced fluorescence spectroscopy (LIF) as a flight or laboratory instrument to analyze organic and mineral material in samples on or returned from carbon‐rich asteroids such as (101955) Bennu by NASA’s OSIRIS‐REx mission. LIF is a unique instrument that is non‐destructive while acquiring data, and allows for no sample preparation, crushing, or cutting. This method provides spectral data indicative of specific minerals and organics in less time than Raman spectroscopy, and can be set up to produce 2‐D raster images of areas of interest. Furthermore, if an LIF system is set up with a gated CCD camera, time‐resolved fluorescence spectroscopy can be performed, providing a unique identification tool for organic and mineral contents using fluorescence decay over several nanoseconds. This technique was used to analyze millimeter‐sized chondrules and calcium‐aluminum‐rich inclusions on four carbonaceous chondrite samples provided by the Royal Ontario Museum: Murchison (CM2), Allende (CV3), NWA 11554 (CV3), and NWA 12796 (CK3). The LIF 2‐D maps, point spectra, and time‐resolved fluorescence data and mineral identifications using LIF were compared to that of well‐known techniques such as Raman spectroscopy and SEM/EDS.

中文翻译：

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紫外激光诱导荧光光谱法作为无损检测碳质球粒陨石中矿物和有机物的技术

在此，我们将讨论无损紫外激光诱导荧光光谱（LIF）作为飞行或实验室仪器的优点，以分析NASA OSIRIS在富含碳的小行星（如（101955）Bennu）或从中返回的样品中的有机和矿物材料‐ REx任务。LIF是一种独特的仪器，在获取数据时不会造成破坏，并且不允许样品制备，压碎或切割。与拉曼光谱法相比，该方法可在更短的时间内提供指示特定矿物和有机物的光谱数据，并且可以设置为产生感兴趣区域的二维光栅图像。此外，如果使用门控CCD相机设置LIF系统，则可以执行时间分辨荧光光谱法，从而利用荧光衰减几纳秒来提供有机和矿物质含量的独特识别工具。这项技术用于分析皇家安大略博物馆提供的四个碳质球粒陨石样品上的毫米大小的球状陨石和富含钙铝的夹杂物：默奇森（CM2），阿连德（CV3），NWA 11554（CV3）和NWA 12796（CK3） ）。将LIF二维图，点光谱，时间分辨荧光数据和使用LIF的矿物鉴定与拉曼光谱和SEM / EDS等著名技术进行了比较。