Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"Presolar grains"”.
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Correlated NanoSIMS, TEM, and XANES Studies of Presolar Grains
… to describe the correlated study of individual presolar grains via Nano-scale Secondary Ion Mass Spectrometry (NanoSIMS), Transmission Electron Microscopy (TEM), and Scanning Transmission X-ray Microscopy (STXM) utilizing X-ray Absorption Near Edge Structure (XANES), with a focus on connecting …
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Microanalytical Investigations of Presolar SiC Grains as Probes of Condensation Conditions in Astrophysical Environments
This thesis reports the microanalysis of sixteen presolar SiC grains that are thought to have condensed in several different types of astrophysical environments, including asymptotic giant branch: AGB) stars, J stars, born-again AGB stars, and Type II supernovae: SNe). The isotopic compositions and …
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Morning light : the secret history of the Tagish Lake Fireball
… any extraterrestrial sample, and an abundance of presolar grains. Rich in extraterrestrial organic compounds and containing distinct hollow organic globules, the primitive meteorite has brought a mini revolution to the field of meteoritics. It may help us understand the beginnings of the solar …
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A study of nitrogen isotopic systematics in lunar soils and breccias
… the formation of amorphous rims around soils grains. A proportion 1-3% I of NHT has been observed in soil A12023. with δ<sup>15</sup>N = -186‰, the lightest observed in a lunar soil. The similarity of this value with that obtained for lunar breccia A79035. has suggested the possibility of a …