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

溅射引发共振电离光谱（SIRIS）， 基于激光诱导共振电离的概念， 溅射原子，提供了使原位化学 和同位素微量分析可能具有出色的灵敏度， 低浓度和组合的优异空间分辨率。 该项目是小型企业下的第一阶段奖励 创新研究计划，将测试SIRIS方法， 地质样品中钙和钛同位素的分析。 研究计划是评估干扰问题， 溅射离子和非共振光离子， 钙和钛的SIRIS分析方法。 这些研究将为更全面地发展 地质样品的SIRIS微量分析技术。

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.