Sputter Initiated Resonance Ionization Spectroscopy for In Situ Microanalysis in the Geosciences

溅射引发共振电离光谱（SIRIS）基于溅射原子的激光诱导共振电离的概念，具有对低浓度的优异灵敏度和出色的空间分辨率，为原位化学和同位素微分析提供了可能。该项目是小企业创新研究计划的第一阶段，将测试SIRIS方法分析地质样品中的钙和钛同位素。研究计划是评估来自溅射离子和非共振光离子的干扰问题，并确定钙和钛的SIRIS分析方法。这些研究将成为SIRIS地质样品微分析技术更普遍发展的基础。

Sputter Initiated Resonance Ionization Spectroscopy (SIRIS), based on the concept of laser-induced resonance ionization of sputtered atoms, offers the potential to make in-situ chemical and isotopic microanalyses possible with excellent sensitivity to low concentrations and combined excellent spatial resolution. This project is a Phase I award under the Small Business Innovation Research Program that will test SIRIS methods for analysis of calcium and titanium isotopes in geological samples. The research plan is to assess interference problems from sputtered ions and nonresonant photo-ions and to identify analytical procedures for SIRIS analysis of calcium and titanium. The studies will form a basis for more general development of SIRIS microanalytical techniques for geological samples.