SNC隕石Y000593の化学組成の特徴(II. 放射化学)
Three activation analysis methods, that is, prompt gamma ray analysis, instrumental neutron activation analysis and instrumental photon activation analysis, were applied to Antarctic nakhlite, Yamato-000593 together with Nakhla and other shergottites for the non-destructive determination of major an...
Main Authors: | , , |
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Format: | Report |
Language: | Japanese |
Published: |
東北大学理学部附属原子核理学研究施設
2003
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Subjects: | |
Online Access: | http://hdl.handle.net/10097/31036 https://tohoku.repo.nii.ac.jp/?action=repository_uri&item_id=12928 https://tohoku.repo.nii.ac.jp/?action=repository_action_common_download&item_id=12928&item_no=1&attribute_id=18&file_no=1 |
Summary: | Three activation analysis methods, that is, prompt gamma ray analysis, instrumental neutron activation analysis and instrumental photon activation analysis, were applied to Antarctic nakhlite, Yamato-000593 together with Nakhla and other shergottites for the non-destructive determination of major and trace elemental contents. Powder samples representing six different portions within Y000593 were analyzed for discussing the chemical heterogeneity. As a result, major elements are homogeneously distributed within ±70%, and trace elements are homogeneously distributed within ±11% except for H, B, Cl, Br and rare earth elements. Based on similarity of chemical composition, crystallization age and cosmic-ray exposure age between Y000593 and Nakhla, these two meteorites were estimated to leave same meteoroid and to fall at separate point of the Earth. |
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