%0 Journal Article
%T Identification of Large Isotope Anomalies in Quartz by Infrared Spectroscopy
%A Cosette Dwyer
%A H¨¦l¨¨ne Couvy
%A Justin Filiberto
%A Max Eisele
%A Michael J. Krawczynski
%A Ryan C. Ogliore
%J Applied Spectroscopy
%@ 1943-3530
%D 2019
%R 10.1177/0003702819842558
%X We report an infrared (IR) spectroscopic technique to detect quartz grains with large isotope anomalies. We synthesized isotopically doped quartz and used Fourier transform infrared spectroscopy (FT-IR) in two different instruments: a traditional far-field instrument and a neaSpec nanoFT-IR, to quantify the shift in the peak of the Si¨CO stretch near 780£¿cm£¿1 as a function of isotope composition, and the uncertainty in this shift. From these measurements, we estimated the minimum detectable isotope anomaly using FT-IR. The described technique can be used to nondestructively detect very small (30£¿nm) presolar grains. In particular, supernova grains, which can have very large isotope anomalies, are detectable by this method
%K Fourier transform infrared
%K FT-IR
%K infrared spectoscopy
%K near-field infrared spectoscopy
%K quartz
%K isotope anomalies
%K presolar grains
%U https://journals.sagepub.com/doi/full/10.1177/0003702819842558