研究目的
To demonstrate and characterize a real-time fiber-optic-coupled dosimetry system using Ag-activated phosphate glasses based on radiophotoluminescent (RPL) phenomena, comparing its performance with real-time fiber plastic scintillation dosimetry.
研究成果
The study successfully demonstrated a real-time fiber dosimetry system using Ag-activated phosphate glasses, characterized its performance, and identified the challenges posed by build-up and fading effects. It suggests the exploration of alternative RPL materials with lower build-up effects for improved real-time dosimetry applications.
研究不足
The build-up and fading effects in Ag-activated RPL glasses pose challenges for accurate real-time dosimetry. The study highlights the need for materials with lower build-up effects for more reliable real-time RPL dosimetry.
1：Experimental Design and Method Selection:
The study involved the use of Ag-activated phosphate glasses (GD-302M) for real-time RPL dosimetry, comparing its performance with plastic scintillation dosimetry. The methodology included time-resolved optical spectra analysis and real-time dose measurement.
2：Sample Selection and Data Sources:
GD-302M dosimeter without a Sn filter was used. The samples were subjected to X-ray and gamma-ray irradiations under controlled conditions.
3：List of Experimental Equipment and Materials:
Equipment included an X-ray unit (RTW MCB 65C-0, 2× and Spellman MNX50P50), a photonic multichannel analyzer (Hamamatsu Photonics PMA-12), and a delay/pulse generator (Stanford Research Systems DG535). Materials included Ag-activated phosphate glasses and a plastic scintillator (Saint-Gobain BC-490).
4：5). Materials included Ag-activated phosphate glasses and a plastic scintillator (Saint-Gobain BC-490).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The procedure involved X-ray irradiation of samples, measurement of RPL signals using a UV laser excitation, and comparison with scintillation dosimetry signals. The build-up and fading effects were analyzed post-irradiation.
5：Data Analysis Methods:
The RPL signals were analyzed using time-resolved techniques, and the data were fitted to second-order polynomial functions and the sum of three exponentials for the exposure and build-up regions, respectively.
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