Benjamin Savannah E, LaVerne Jay A, Sigmon Ginger E, Burns Peter C
Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Radiation Laboratory and Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Inorg Chem. 2023 Jul 24;62(29):11602-11610. doi: 10.1021/acs.inorgchem.3c01337. Epub 2023 Jul 11.
The effects of water vapor and He ion irradiation on the alteration of particles of the uranyl hydroxide phase metaschoepite, (UO)O(OH), are determined. Raman spectra collected immediately postirradiation revealed the presence of a uranyl oxide phase structurally similar to γ-UO or UO. Short-term storage postirradiation at elevated relative humidity accelerated formation of the uranyl peroxide phase studtite, (UO)(O)(HO). Experiments examining the degradation of metaschoepite and the hydration of UO enabled spectral assignments and identification of reaction pathways. The results provide insights into thermal and radiolytic degradation products in both irradiated uranyl hydroxide phases and uranyl peroxide phases, which follow similar degradation pathways.
测定了水蒸气和氦离子辐照对氢氧化铀酰相变水铀矿(UO)O(OH)颗粒变化的影响。辐照后立即收集的拉曼光谱显示存在一种结构类似于γ-UO或UO的氧化铀酰相。辐照后在较高相对湿度下短期储存加速了过氧铀酰相柱铀矿(UO)(O)(HO)的形成。研究变水铀矿降解和UO水合作用的实验实现了光谱归属和反应途径的识别。结果为辐照氢氧化铀酰相和过氧铀酰相中的热降解产物和辐射降解产物提供了见解，它们遵循相似的降解途径。
