کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1239975 1495693 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Theoretical modeling and analysis of the emission spectra of a ChemCam standard: Basalt BIR-1A
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Theoretical modeling and analysis of the emission spectra of a ChemCam standard: Basalt BIR-1A
چکیده انگلیسی


• LIBS basalt spectrum
• Ab-initio theoretical modeling
• Discussion of matrix effects
• Discussion of radiation transport effects
• High-resolution measurements of Basalt

We report 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. Finally, we also provide comparisons of the ChemCam measurement with new high-resolution spectral measurements.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part B: Atomic Spectroscopy - Volume 110, 1 August 2015, Pages 20–30
نویسندگان
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