An overview of NRL's NAUTILUS: a combination SIMS-AMS for spatially resolved trace isotope analysis,Journal of Analytical Atomic Spectrometry

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An overview of NRL's NAUTILUS: a combination SIMS-AMS for spatially resolved trace isotope analysis
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2020/02/05 , DOI: 10.1039/c9ja00344d
Evan E Groopman ₁ , David G Willingham ₁ , Albert J Fahey ₂ , Kenneth S Grabowski ₁

Affiliation

We present a description of the capabilities and performance of the NAval Ultra-Trace Isotope Laboratory's Universal Spectrometer (NAUTILUS) at the U.S. Naval Research Laboratory. The NAUTILUS combines secondary ion mass spectrometry (SIMS) and single-stage accelerator mass spectrometry (SSAMS) into a single unified instrument for spatially resolved trace element and isotope analysis. The NAUTILUS instrument is essentially a fully functional SIMS instrument with an additional molecule-filtering detector, the SSAMS. The combination of these two techniques mitigates the drawbacks of each and enables new measurement paradigms for SIMS-like microanalysis. Highlighted capabilities include molecule-free raster ion imaging for direct spatially resolved analysis of heterogeneous materials with or without perturbed isotopic compositions. The NAUTILUS' sensitivity to trace elements is at least 10× better than commercial SIMS instruments due to near-zero background conditions. We describe the design and construction of the NAUTILUS, and its performance applied to topics in nuclear materials analysis, cosmochemistry, and geochemistry.

中文翻译：

NRL 的 NAUTILUS 概述：用于空间分辨痕量同位素分析的 SIMS-AMS 组合

我们介绍了美国海军研究实验室的海军超痕量同位素实验室通用光谱仪 (NAUTILUS) 的功能和性能。 NAUTILUS 将二次离子质谱 (SIMS) 和单级加速器质谱 (SSAMS) 组合成一个统一的仪器，用于空间分辨痕量元素和同位素分析。 NAUTILUS 仪器本质上是一款功能齐全的 SIMS 仪器，带有附加的分子过滤检测器 SSAMS。这两种技术的结合消除了各自的缺点，并为类似 SIMS 的微量分析提供了新的测量范例。突出的功能包括无分子光栅离子成像，用于对有或没有扰动同位素成分的异质材料进行直接空间分辨分析。由于背景条件接近于零，NAUTILUS 对微量元素的灵敏度至少比商用 SIMS 仪器高 10 倍。我们描述了 NAUTILUS 的设计和构造，及其应用于核材料分析、宇宙化学和地球化学等主题的性能。

更新日期：2020-03-12

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