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Quasi-1D Energy Transfer Enabling Tb₂W₃O₁₂:Eu³⁺ Scintillator for Low-Dose High-Resolution X-Ray Imaging.

Zonglong Guo¹, Shaoan Zhang¹, Chao He¹

¹Institute of Light+X Science and Technology, Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)

|August 16, 2025

Summary

Researchers developed a novel inorganic scintillator using a rare-earth matrix for efficient X-ray energy conversion. This design enhances energy transfer, enabling high-sensitivity, low-dose X-ray imaging for medical and industrial applications.

Keywords:

Tb2W3O12:Eu3+ scintillator energy transfer rare‐earth x‐ray imaging

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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

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Published on: April 14, 2020

Area of Science:

Materials Science
Solid-State Physics
Radiological Imaging

Background:

Inorganic scintillators face challenges in X-ray energy conversion efficiency.
Conventional doping strategies lead to energy losses due to inefficient host-to-activator transfer.
Concentration quenching is a limiting factor in rare-earth scintillator development.

Purpose of the Study:

To design a novel rare-earth matrix for enhanced X-ray energy conversion efficiency.
To investigate quasi-1D energy transfer mechanisms in Tb³⁺-Eu³⁺ systems.
To develop high-sensitivity scintillators for low-dose X-ray imaging.

Main Methods:

Proposed a rare-earth matrix design using Tb³⁺ as host and Eu³⁺ as activator.
Investigated Dexter-type energy transfer between Tb³⁺ and Eu³⁺ ions in quasi-1D chains.
Fabricated and characterized Tb_1.8W₃O₁₂:0.2Eu³⁺@PMMA scintillator films.

Main Results:

Achieved near-unity energy transfer efficiency via Tb³⁺: ⁵D₄ → Eu³⁺: ⁵D₁/⁵D₂ transfer.
Optimized scintillator film demonstrated an X-ray light yield of 25,000 photons·MeV^-1 at 22 keV.
Exhibited excellent spatial resolution (14 lp mm^-1) and ultra-low detection limit (14.1 nGy_air s^-1).

Conclusions:

Established a paradigm for high-sensitivity scintillator design through quasi-1D energy transfer.
Demonstrated effective high-resolution radiography of biological specimens at the 0.1 mm scale.
Advanced potential for low-dose X-ray imaging in medical diagnostics and industrial inspection.