Katsuaki Akaoka

We report a feasibility study on surface hardness assessment of spatially inhomogeneous radioactive materials using fiber-optic laser-induced breakdown spectroscopy (FO-LIBS) with externally supplied nitrogen gas. Conventional LIBS-based hardness assessment relies on emission lines from material components, which may not be consistently available across heterogeneous samples such as nuclear fuel debris.

Simultaneous analysis of gadolinium and surface imaging using a fiber-coupled acoustic wave-assisted microchip LIBS system This paper reports a pioneering attempt at simultaneously analyzing gadolinium (Gd) distribution and surface imaging of surrogate debris samples with homogeneous and heterogeneous composition using a fiber-coupled acoustic wave-assisted microchip laser-induced breakdown spectroscopy (AW-mLIBS) system.