| タイトル | Alpha-decay-induced fracturing in zircon - The transition from the crystalline to the metamict state |
| 著者（英） | Murakami, Takashi; Lumpkin, Gregory R.; Chakoumakos, Bryan C.; Ewing, Rodney C. |
| 著者所属（英） | New Mexico Univ. |
| 発行日 | 1987-06-19 |
| 言語 | eng |
| 内容記述 | Zonation due to alpha-decay damage in a natural single crystal of zircon from Sri Lanka is discussed. The zones vary in thickness on a scale from one to hundreds of microns. The uranium and thorium concentrations vary from zone to zone such that the alpha decay dose is between 0.2 x 10 to the 16th and 0.8 x 10 to the 16th alpha-events per milligram. The transition from the crystalline to the aperiodic metamict state occurs over this dose range. At doses greater than 0.8 x 10 to the 16th alpha events/mg there is no evidence for long-range order. This type of damage will accumulate in actinide-bearing, ceramic nuclear waste forms. The systematic pattern of fractures would occur in crystalline phases that are zoned with respect to actinide radionuclides. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 87A45906 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/376683 |
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