Investigation of the Microstructure and Scintillation Properties of Ce-Doped CaF2/LiF Eutectics for Thermal Neutron Detection
Tomoaki Matsuyama, Kei Kamada, Masao Yoshino, Rikito Murakami, Satoshi Ishizawa, Yuui Yokota, Akira Yoshikawa
TL;DR
This study develops a new Ce-doped eutectic scintillator for detecting thermal neutrons, showing improved sensitivity and performance for nuclear decommissioning.
Contribution
The paper introduces a novel Ce-doped CaF2/LiF eutectic scintillator with optimized neutron sensitivity and fast decay time.
Findings
A 1 mol% Ce-doped sample showed 1.5 times higher neutron sensitivity than Ce:LiCaAlF6 crystals.
The eutectic exhibited a 1.6-times higher neutron-induced light yield and a 400 ns decay time.
The material's microstructure and scintillation properties were thoroughly characterized for performance validation.
Abstract
With the growing global emphasis on nuclear reactor decommissioning, reliable thermal neutron detection has become increasingly important for ensuring critical safety and for the identification of fuel debris and radioactive waste. In this context, this study developed and characterized a Ce-doped CaF2/6LiF (Ce:CaF2/LiF) eutectic scintillator for thermal neutron detection with Ce concentrations ranging from 0.5 to 10 mol%. The eutectic samples were grown by the melt-solidification method, and their crystalline properties were evaluated using inductively coupled plasma mass spectrometry, X-ray diffraction, scanning electron microscopy, and field-emission electron probe microanalysis. Radioluminescence, photoluminescence, transmittance, scintillation decay, and pulse-height measurements were conducted to assess their scintillation performance. Structural characterization revealed a…
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Taxonomy
TopicsRadiation Detection and Scintillator Technologies · Luminescence Properties of Advanced Materials · Radioactive contamination and transfer