Lawrence Livermore National Security, LLC

Picarro, Inc.

Alan Daniel McCartt

Chris W Rella

Sze Meng Tan

Eric R Crosson

John Allen Hoffnagle

Kenneth W Turteltaub

Graham Bench

Ted Ognibene

Nabil Saad

Optical spectrometer apparatus, systems, and methods for analysis of carbon-14 including a resonant optical cavity configured to accept a sample gas including carbon-14, an optical source configured to deliver optical radiation to the resonant optical cavity, an optical detector configured to detect optical radiation emitted from the resonant cavity and to provide a detector signal; and a processor configured to compute a carbon-14 concentration from the detector signal, wherein computing the carbon-14 concentration from the detector signal includes fitting a spectroscopic model to a measured spectrogram, wherein the spectroscopic model accounts for contributions from one or more interfering species that spectroscopically interfere with carbon-14.

Spectroscopic quantification of extremely rare molecular species in the presence of interfering optical absorption

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San Francisco, CA, United States of America

Alan Daniel McCartt