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Title: Theoretical modeling and analysis of the emission spectra of a ChemCam standard: Basalt BIR-1A

Journal Article · · Spectrochimica Acta. Part B, Atomic Spectroscopy

We report here on efforts to perform theoretical modeling of the emission spectrum measured from a basalt sample. We compare our calculations with measurements that were made to provide standards for the ChemCam instrument on the Mars Science Laboratory. We find that to obtain good agreement between modeling and the measurement, it is necessary to determine atomic and ionic level populations via a multi-element approach in which the free electron density that is created influences all the species within the plasma. Calculations that consider each element separately are found to be in poorer agreement with the measured spectrum, indicating that the ‘matrix effect’ term often used to describe the influence of other species on the emission spectrum from a given element is due to the influence of the global electron density of the plasma. We explore the emission features in both the visible and near-infrared wavelength ranges, and also examine radiation transport effects for some of the most intense features found in the basalt spectrum. We also provide comparisons of the ChemCam measurement with new high-resolution spectral measurements.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); LANL Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-06NA25396; AC5206NA25396
OSTI ID:
1489944
Alternate ID(s):
OSTI ID: 1422665
Report Number(s):
LA-UR-15-21167
Journal Information:
Spectrochimica Acta. Part B, Atomic Spectroscopy, Vol. 110; ISSN 0584-8547
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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