Valence states of 57Fe decayed from 57Mn implanted into KMnO4
Valence states of 57Fe decayed from 57Mn implanted into KMnO4
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57Fe 的价态从注入 KMnO4 的 57Mn 中衰变
DOI：
10.1023/a:1022585622743
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发表时间：
2003
影响因子：
1.6
通讯作者：
K. Asahi
中科院分区：
文献类型：
--
作者：
Y. Kobayashi;M. K. Kubo;Y. Yamada;T. Saito;H. Ueno;H. Ogawa;W. Sato;K. Yoneda;H. Watanabe;N. Imai;H. Miyoshi;K. Asahi
在11 ~ 130 K温度范围内，测量了短寿命57 Mn（T1/2= 1.45 min）注入高锰酸钾（KMnO 4）后衰变的57 Fe在束穆斯堡尔谱。这是第一次应用二次RI束研究核转变后的价态。在90 K以下获得的束内穆斯堡尔谱可以用两个分量进行分析，一个是双峰，一个是单峰。从分子轨道波函数的计算，建议的单线态是替代57 Fe原子的Mn位四面体[MnO 4]-与一个异常高价态的Fe 8+。
In-beam Mössbauer spectra of57Fe, decayed from short-lived57Mn (T1/2= 1.45 min) implanted into potassium permanganate, KMnO4, were measured at temperatures between 11 K and 130 K. This is the first application of a secondary RI beam to the study of valence states after nuclear transformation. The in-beam Mössbauer spectra obtained below 90 K could be analyzed with two components, a doublet and a singlet. From the calculations of the molecular orbital wave functions, the singlet is suggested to be substitutional57Fe atoms for Mn-sites in tetrahedral [MnO4]–with an unusually high valence state of Fe8+.