Development of 166Er Mössbauer spectroscopy in KURNS
Development of 166Er Mössbauer spectroscopy in KURNS
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KURNS 开发 166Er 穆斯堡尔光谱
DOI：
10.1007/s10751-019-1623-6
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发表时间：
2019
影响因子：
--
通讯作者：
M. Seto
中科院分区：
文献类型：
--
作者：
S. Nakamura;H. Yokota;S. Kitao;Yasuhiro Kobayashi;M. Saito;R. Masuda;M. Seto
京都大学综合辐射与核科学研究所（KURNS）最近开发了166 Er穆斯堡尔谱仪。166 Ho放射源选用HoAl 2。将化合物在核反应堆（1 MW）中辐照5分钟。源的强度为19 MBq，半衰期为26.8 h。我们有幸在放射源准备好后立即进行测量，因为光谱设备就位于反应堆旁边。在40 K下测量了三种典型的Er氧化物Er 2 O3、ErFeO 3和ErMnO 3的光谱。根据计算得到的非对称性参数η和由结构参数估算出的四极耦合常数2 qQ/2的符号，我们成功地用四极哈密顿量分析了传输积分线型下的光谱。测得了三个样品的166 Er穆斯堡尔参数、同质异能移IS、e2 qQ/2和线宽W。
We have newly developed166Er Mössbauer spectroscopy in Institute for Integrated Radiation and Nuclear Science, Kyoto University (KURNS). As166Ho radioactive source, HoAl2was used. The compound was irradiated in the nuclear reactor (1 MW) for 5 min. The source has the intensity of 19 MBq and the half-life of 26.8 h. It is our privilege to conduct measurement immediately after the preparation of the radioactive source, since the spectroscopic equipment is situated just next to the reactor. The spectra of three typical Er oxides, Er2O3, ErFeO3, and ErMnO3were measured at 40 K. On the basis of the calculated asymmetry parameterηand the evaluated sign of the quadrupole coupling constante2qQ/2 from the structure parameters, we have successfully analyzed the spectra by using the quadrupole Hamiltonian assuming the transmission integral line shapes. The166Er Mössbauer parameters, isomer shiftIS,e2qQ/2, and line widthWwere obtained for the three specimens.