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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Isotopes of yttrium ： ウィキペディア英語版 Isotopes of yttrium Natural yttrium (Y) is composed of a single isotope 89Y. The most stable radioisotopes are 88Y, which has a half-life of 106.6 days and 91Y with a half-life of 58.51 days. All the other isotopes have half-lives of less than a day, except 87Y, which has a half-life of 79.8 hours, and 90Y, with 64 hours. The dominant decay mode below the stable 89Y is electron capture and the dominant mode after it is beta emission. Twenty-six unstable isotopes have been characterized. 90Y exists in equilibrium with its parent isotope strontium-90, which is a product of nuclear fission. Standard atomic mass: 88.90585(2) u == Table == 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Isotopes of yttrium」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.