Browsing National Museum of Natural History by Author "Ebel, Denton S."

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The Major-Element Composition of Mercury s Surface from MESSENGER X-ray Spectrometry

Nittler, Larry R.; Starr, Richard D.; Weider, Shoshana Z.; McCoy, Timothy J.; Boynton, William V.; Ebel, Denton S.; Ernst, Carolyn M.; Evans, Larry G.; Goldsten, John O.; Hamara, David K.; Lawrence, David J.; McNutt, Ralph L.; Schlemm, Charles E.; Solomon, Sean C.; Sprague, Ann L. (2011)

X-ray fluorescence spectra obtained by the MESSENGER spacecraft orbiting Mercury indicate that the planet s surface differs in composition from those of other terrestrial planets. Relatively high Mg/Si and low Al/Si and ...
Radioactive Elements on Mercury s Surface from MESSENGER: Implications for the Planet s Formation and Evolution

Peplowski, Patrick N.; Evans, Larry G.; Hauck, Steven A.; McCoy, Timothy J.; Boynton, William V.; Gillis-Davis, Jeffery J.; Ebel, Denton S.; Goldsten, John O.; Hamara, David K.; Lawrence, David J.; McNutt, Ralph L.; Nittler, Larry R.; Solomon, Sean C.; Rhodes, Edgar A.; Sprague, Ann L.; Starr, Richard D.; Stockstill-Cahill, Karen R. (2011)

The MESSENGER Gamma-Ray Spectrometer measured the average surface abundances of the radioactive elements potassium (K, 1150 ± 220 parts per million), thorium (Th, 220 ± 60 parts per billion), and uranium (U, 90 ± 20 parts ...

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