2018年3月1日 · A (111) air-exposed surface of UO 2 thin film (150 nm) on (111) YSZ (yttria-stabilized zirconia) before and after the Ar + etching and subsequent in situ annealing in the …

An effective technique for determination of ionic composition (U4+, U5+, U6+) and oxygen coefficient in UO2+x was introduced and developed. This method is based on the U 5f and U …

2021年1月1日 · UO 2 pellets exposed to 1.85 MBq and 3.30 MBq Am-241 sources with a 30 μm separation in solution were studied under Ar and H 2 atmospheres. The 1.85 MBq Am-241 …

2023年8月30日 · In this work, the influence of Gd III doping on the surface oxidation of UO 2 has been investigated in situ by XPS. The samples were put in contact with either hydrogen, argon …

Polycrystalline uranium dioxide is known almost always to con-tain excessive oxygen. Its general formula is UO2+x (x>0.01). As oxygen excess grows, UO2 cell shrinks to ax =5.4690–0.12x …

2008年1月23日 · 采用X射线光电子能谱(XPS)研究了表面氧化物的铀金属在低真空条件下加热后表面形成的银白色氧化膜的化学组成.结果表明,氧化膜的组成由表及里依次为:UO2 x,UO2和碳氧 …

2016年8月15日 · XPS determination of the oxygen coefficient kO = 2 + x and ionic (U(4+), U(5+), and U(6+)) composition of oxides UO2+x formed on the surfaces of differently oriented (hkl) …

The XPS narrow-scan region (Figure 4 a) shows the near-surface uranium presence of the pristine UO2 electrode 29.2% of U(VI), which is likely related to UO3 due to exposure to air. …

2023年5月2日 · XPS results show that U(V) is the main oxidation state of uranium after UO2 was exposed to either oxidants or γ-radiation in HCO3− solution. The stoichiometric ratio of U/O of …

2008年3月1日 · We have shown that the simulated U4f XPS spectrum of the free U 4+ cation has a significant multiplet structure that is strongly modified and hidden by interatomic effects due …