| タイトル | Cosmogenic radionuclides in the Allende and Murchison carbonaceous chondrites. |
| 著者（英） | Cressy, P. J., Jr. |
| 発行日 | 1972-09-10 |
| 言語 | eng |
| 内容記述 | Measurements were made of Na-22, Al-26, Mn-54, and Co-60 produced by cosmic rays in five samples of the Allende C3 meteorite and in one specimen of Murchison (C2); Sc-46, V-48, Cr-51, and Co-57 were also measured in several of these samples. Comparison of observed Allende Co-60 activities with calculated neutron-capture production rates yields a depth scale for Allende that appears unambiguous to about 30-cm depth. Using this scale, the production of Al-26 is constant to a depth in excess of 30 cm, Na-22 activity increases 30% from near the surface of Allende to 20- to 30-cm depth, and Mn-54 production increases 50% over the same depth range. |
| NASA分類 | SPACE SCIENCES |
| レポートNO | 72A42466 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/460812 |
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