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Discrimination and Quantification of Fe and Ni Abundances in Genesis 2 Solar Wind Implanted Collectors using X-ray Standing Wave 3 Fluorescence Yield Depth Profiling with Internal Referencing

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Title: Discrimination and Quantification of Fe and Ni Abundances in Genesis 2 Solar Wind Implanted Collectors using X-ray Standing Wave 3 Fluorescence Yield Depth Profiling with Internal Referencing
Author(s): Choi Y; Eng P; Stubbs J; Sutton SR; Schmeling M; Veryovkin IV; Burnett D
Subject(s): Solar wind fluence Genesis mission x-ray standing wave analysis depth profile modeling implant quantification
Abstract: X-ray standing wave fluorescence yield depth profiling was used to determine the solar wind implanted Fe and Ni fluences in a silicon-on-sapphire (SoS) Genesis collector (60326). An internal reference standardization method was developed based on fluorescence from Si and Al in the collector materials. Measured Fe fluence agreed well with that measured previously by us on a sapphire collector (50722) as well as SIMS results by Jurewicz et al. Measured Ni fluence was higher than expected by a factor of two; neither instrumental errors nor solar wind fractionation effects are considered significant perturbations to this value. Impurity Ni within the epitaxial Si layer, if present, could explain the high Ni fluences and therefore needs further investigation. As they stand, these results are consistent with minor temporally-variable Fe and Ni fractionation on the timescale of a year.
Issue Date: 2016-11
Publisher: Elsevier
Citation Info: Choi, Y., Eng, P., Stubbs, J., Sutton, S. R., Schmeling, M., Veryovkin, I. V. and Burnett, D. Discrimination and quantification of Fe and Ni abundances in Genesis solar wind implanted collectors using X-ray standing wave fluorescence yield depth profiling with internal referencing. Chemical Geology. 2016. 441: 246-255. doi: 10.1016/j.chemgeo.2016.08.025.
Type: Article
Description: This is the author’s version of a work that was accepted for publication in Chemical Geology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in PUBLICATION, Chemical Geology. 2016. 441: 246-255. doi: 10.1016/j.chemgeo.2016.08.025.
URI: http://hdl.handle.net/10027/21425
ISSN: 0009-2541
Sponsor: This research was supported by NASA Grants DDAP No. NNX07AG02G and SRLIDAP No. NNX07AL96G to Northern Illinois University (K. Kitts, PI), and NASA LARS grants NNX10AH05G to Loyola University Chicago (M. Schmeling, PI) and NNH09AM48I (I. Veryovkin, PI) to Argonne National Laboratory. This work was performed at GeoSoilEnviroCARS (The University of Chicago, Sector 13), Advanced Photon Source (APS), Argonne National Laboratory. GeoSoilEnviroCARS is supported by the National Science Foundation - Earth Sciences (EAR-1128799) and Department of Energy- GeoSciences (DE-FG02-94ER14466). This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
Date Available in INDIGO: 2017-11-02
 

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