Laser ablation molecular isotopic spectrometry of carbon isotopes
- Applied Spectra, Inc., Fremont, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
- Applied Spectra, Inc., Fremont, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Quantitative determination of carbon isotopes using Laser Ablation Molecular Isotopic Spectrometry (LAMIS) is described. Optical emission of diatomic molecules CN and C2 is used in these measurements. Two quantification approaches are presented:empirical calibration of spectra using a set of reference standards and numerical fitting of a simulated spectrum to the experimental one. Formation mechanisms of C2 and CN in laser ablation plasma are briefly reviewed to provide insights for implementation of LAMIS measurements. A simulated spectrum of the 12C2 Swan system was synthesized using four constituents within 473.5–476.5 nm. Simulation included three branches of 12C2 (1-0), branches R(0-0) and R(1-1), and branch P(9-8) of 12C2. Spectral positions of the tail lines in R(0-0) and R(1-1) were experimentally measured, since they were not accurately known before. The Swan band (1-0) of the isotopologue 13C12C was also simulated. Fitting to the experimental spectrumyielded the ratio 13C/12C = 1.08% in a good agreement with measurements by isotope ratio mass spectrometry. LAMIS promises to be useful in coal, oil and shale exploration, carbon sequestration monitoring, and agronomy studies.
- Research Organization:
- Applied Spectra, Inc., Fremont, CA (United States); National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Fossil Energy (FE)
- Grant/Contract Number:
- SC0007546; AC02-05CH11231
- OSTI ID:
- 1894984
- Alternate ID(s):
- OSTI ID: 1251860; OSTI ID: 1480843
- Report Number(s):
- NETL-PUB-20040; TRN: US2310322
- Journal Information:
- Spectrochimica Acta. Part B, Atomic Spectroscopy, Vol. 113, Issue C; ISSN 0584-8547
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Laser ablation molecular isotopic spectrometry
LAMIS
LIBS
Carbon
Molecule
Isotope
Isotopologue
Carbon Isotope