Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1359v&link_type=abstract
Lunar and Planetary Science, volume 27, page 1359
Other
Cathodoluminescence, Chromium, Forsterites
Scientific paper
Forsterite in extraterrestrial material shows compositional differences among different meteorite groups. These compositional and other differences are reflected in cathodoluminescence (CL) spectra. While most CL spectra have been obtained at room temperature, low temperature spectra may reveal additional CL details related to composition and structure. Below we explore the modifications of the CL at low temperature using forsterite from Murchison with spectra obtained in situ to preserve petrographic integrity. We describe the effects of accelerating voltage and incident current on resulting spectra and describe the spectral modifications at temperatures as low as 140K which include sharper peaks, changes in relative intensity, and peak splitting. These effects must be related to the composition and structural details of forsterite and indirectly to growth conditions.
Steele Ian M.
Vasconcellos A. Z. M.
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