Light Yield and F-O-M Irradiation Degradation of Polysiloxane, Polyvinyltoluen, EJ200, and EJ276D Organic Scintillators Via a 6MV, 40kgy Absorbed Dose
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Lassair, Erick
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Abstract
Sixteen samples of organic scintillators fabricated from polysiloxane and polyvinyltoluene bulk solvents were taken to quantify their radiation hardness and irradiation degradation mechanisms. These samples received an absorbed dose of 40 kGy of 6MV irradiation via a Varian Clinical Linear Accelerator and their light yield and figure-of-merit were analyzed in increments of 10 kGy. It was found that the polysiloxane bulk solvent has a slower rate of light yield degradation, but a faster rate of figure-of-merit degradation when compared to the PVT matrix.
At 10kGy, control samples EJ200 and EJ276 were among the highest rates of percent light yield and F-O-M degradation when compared to all samples. Additionally, secondary dopant, Bis-MSB, had the highest rates of light yield degradation across both bulk solvents at 40kGy, suggesting a radio-sensitivity.
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2025-12
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Text
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Thesis (Masters Degree)