Scanning electron microscope (SEM) analyses of a ferromagnesian presolar silicate grain and an Al-bearing presolar oxide grain in OREX-501018-100. The dataset contains SEM Backscatter Electron (BSE) images, X-ray element maps and Energy Dispersive X-ray (EDX) spectra of two presolar grains pressed into high purity Au foil.

20240222_SEM_JSC-ARES_OREX-501018-100_1_SEMEDSPointData_301.emsa

20240222_SEM_JSC-ARES_OREX-501018-100_1_SEMEDSPointData_301.yaml

20240222_SEM_JSC-ARES_OREX-501018-100_1_instrumentMetadata_2844.pdf

20240222_SEM_JSC-ARES_OREX-501018-100_1_instrumentMetadata_2844.yaml

This material is supported by NASA under contract NNM10AA11C issued through the New Frontiers program.

Scanning electron microscopy

JEOL 7600F

NASA Johnson Space Center

Instrument generated metadata for Oxide Spectrum 31 - low mag background. Note: We plot emsa files on a X-Y graph with keV along the X-axis and the number of counts on the Y-axis. This will produce a graph with peaks for the elements that are present. The kiloelectronvolts typically plot from 0-10 keV, but the program begins a little below zero because it uses these negative values to establish a ‘zero-peak’ that will compensate for the proper calibration—that is—so the element peaks come out at their proper energies.

Astromat

SEM Characterization of a Presolar Silicate and Presolar Oxide Grain in sample OREX-501018-100

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