Probe Beam Detection of Laser-Induced Breakdown for Measuring Solubility of Actinide Compounds

概要

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A nondestructive laser-induced breakdown detection technique is developed, which entails measuring the deflection of a probe laser beam due to a shock wave generated by a laser-induced breakdown of colloidal nanoparticles in liquids. Comparing this optical method with a previously developed acoustic detection method using a piezoelectric transducer, it enables remote measurement and therefore facilitates the in situ measurement of samples in a radiation-shielded glove box. The probe beam detection of a shock wave shows a sufficiently high sensitivity for monitoring the initial colloid formation when the uranium ion concentration exceeds the solubility limit of uranium hydrolysis compounds at a certain pH. The mean solubility product $\log K_{\text{sp}}^{\circ} = -23.23 \pm 0.04$ at an ionic strength of zero determined in this work agrees well with the previously reported result, $\log K_{\text{sp}}^{\circ} = -23.19 \pm 0.43$, measured by a calorimetric experiment on UO3$\cdot$2H2O(cr).
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2008-05-25