Mapping of rare earth elements in nuclear waste glass-ceramic using micro laser-induced breakdown spectroscopy

作者：Wang X; Motto Ros V; Panczer G^*; De Ligny D; Yu J; Benoit J M; Dussossoy J L; Peuget S

来源：Spectrochimica Acta Part B: Atomic Spectroscopy , 2013, 87: 139-146.

DOI：10.1016/j.sab.2013.05.022

• mu LIBS
• Glass-ceramic
• Rare earth
• Nuclear waste
• Mapping

A micro-LIBS system was set up based on a quadruple Nd:YAG laser at 266 nm coupled with a microscope. Elemental mapping was performed on a Mo-rich glass-ceramic sample containing CaMoO4 crystallites hundreds of microns in length and about 25 mu m in section diameter. The topography of single-shot laser-induced craters was characterized using an atomic force microscope (AFM), which revealed a crater size less than 7 mu m. Mappings of Mo, Ca, Sr, Al, Fe, Zr and rare earth elements such as Eu, Nd, Pr and La were undertaken. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was conducted to validate the micro-LIBS analysis. Principal components analysis calculation was used to investigate the correlation of elements in the two phases of glass-ceramic. Correlation between Ca, Sr, rare earth elements and Mo indicates their preferential incorporation into the calcium molybdate crystalline phase. Anti-correlation between Fe, Zr, Al and Mo revealed their affinity to the glass phase.

• 出版日期2013-9-1
• 单位中国地震局