| タイトル | The record of solar and galactic radiations in the ancient lunar regolith and their implications for the early history of the sun and moon |
| 著者（英） | Morrison, D. A.; Walker, R. M.; Poupeau, G.; Zinner, E.; Grozaz, G. |
| 著者所属（英） | Washington Univ.|NASA Johnson Space Center |
| 発行日 | 1977-03-31 |
| 言語 | eng |
| 内容記述 | The paper reviews research into the nature and history of the lunar environment, as recorded in rocks and core samples, performed by studying effects produced by the energetic nuclear particles constituting the solar wind, solar flares, and galactic cosmic rays. Results obtained with lunar rocks are discussed which suggest a remarkable constancy of the lunar environment at least over the last several million years. Analyses of lunar core samples are examined which indicate an apparent secular change in the N-15/N-14 ratio with time in solar-wind-related nitrogen, possibly due to greatly enhanced solar flare activity in the past. Lunar and meteoritic breccias are proposed as obvious candidates for extending the radiation record much further back in time, perhaps even close to the beginning of the solar system. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 77A29239 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/438455 |
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