A study on the synergetic effect of electronic excitation/dislocation damage by in-situ measurement method under irradiation

Gd_2O_3掺杂CeO_2(GDC)是一种耐辐射的萤石结构氧化物。这种氧化物可以作为核燃料的替代品，如(U，Gd)O2。GDC具有由于CeO2-x还原或Gd3+离子替换到Ce4+离子位置而产生的自然氧空位(Vos)，导致协同碰撞，有助于辐射损伤的恢复。通过改变Gd掺杂浓度来检查GDC，并将它们暴露在高离子通量下的重离子中，以确定VOS的影响及其结构评估。为了评估这些因素造成的无序程度，对原始和辐照样品进行了中长期尺度的分析，高能电子辐照下的原位阴极发光光谱分析，以确定VOS在束流条件下的电荷态。

Gd2O3 doped CeO2 (GDC)is a fluorite sturcture which is a radiation-resistant oxides. This oxide can be a substitute of the nuclear fuel, such as (U,Gd)O2.GDC has nature oxygen vacancies (VOs) generated by reduction of CeO2-x or substitution of Gd3+ ion to Ce4+ ion site, resulting in a cooperative impact that aids in the restoration of radiation damage.The GDC is examined by varying Gd dopant concentration, and they were exposed to heavy ions at high ion fluences to determine the impact of VOs and its stuructue evaluation.To assess the extent of disordering caused by these factors, both virgin and irradiated samples were analyzed on long- and medium-range scales, and images of the affected areas were examined using TEM.In-situ cathodoluminescence spectroscopy under high-energy electron irradiation were also analyzed to determine the charge states of VOs in the beam condition.