| タイトル | 環境中性子による放射化:天然の放射性Eu及びCoの発見と広島・長崎の原爆中性子評価におけるバックグラウンド成分としての寄与 |
| その他のタイトル | Radionuclides induced by environmental neutrons: Discovery of natural radioactive E[lc]u and C[lc]o isotopes and their contribution to the evaluation of atomic-bomging neutrons in Hiroshima and Nagasaki |
| 著者（日） | 小村 和久; Yousef, Ahmed M. |
| 著者（英） | Komura, Kazuhisa; Yousef, Ahmed M. |
| 著者所属（日） | 金沢大学 理学部附属低レベル放射能実験施設; South Valley University |
| 著者所属（英） | Kanazawa University Low Level Radioactivity Laboratory, Faculty of Science; South Valley University |
| 発行日 | 2001-06 |
| 刊行物名 | Proceedings of the Second Workshop on Environmental Radioactivity
Proceedings of the Second Workshop on Environmental Radioactivity |
| 開始ページ | 98 |
| 終了ページ | 106 |
| 刊行年月日 | 2001-06 |
| 言語 | jpn |
| 抄録 | Radioactive europium and cobalt isotopes induced by environmental neutrons have been discovered by low-background Ge detector installed in Ogoya underground laboratory. Specific activities of Eu-152, Eu-154 and Eu-155 and Co-60 were measured for recent and old europium and cobalt reagents. Ob served activities are 0.06-0.52 dpm/g for Eu-152, 0.09-0.16 dpm/g for Eu-154 and 0.005-0.16 dpm/g for Eu-155 and 0.007-0.083 dpm/g for Co-60. Contribution of natural Eu-152 and Co-60 in Atomic-bomb exposed samples are found to be negligible low and less than 10 percent, respectively. |
| キーワード | environmental neutron; natural Eu-152; natural Co-60; atomic bomb; Ge detector; nuclear reaction; radioactive decay; 環境中性子; 天然Eu-152; 天然Co-60; 原子爆弾; Ge検出器; 核反応; 放射性崩壊 |
| 資料種別 | Conference Paper |
| SHI-NO | AA0033077018 |
| レポートNO | KEK-Proceedings-2001-14 |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/48528 |
