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Title: Measurement of radiation damage of water-based liquid scintillator and liquid scintillator

Journal Article · · Journal of Instrumentation
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  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Phenix Medical LLC, Bloomington, IN (United States)
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Liquid scintillating phantoms have been proposed as a means to perform real-time 3D dosimetry for proton therapy treatment plan verification. We have studied what effect radiation damage to the scintillator will have upon this application. We have performed measurements of the degradation of the light yield and optical attenuation length of liquid scintillator and water-based liquid scintillator after irradiation by 201 MeV proton beams that deposited doses of approximately 52 Gy, 300 Gy, and 800 Gy in the scintillator. Liquid scintillator and water-based liquid scintillator (composed of 5% scintillating phase) exhibit light yield reductions of 1.74 ± 0.55 % and 1.31 ± 0.59 % after ≈ 800 Gy of proton dose, respectively. Some increased optical attenuation was observed in the irradiated samples, the measured reduction to the light yield is also due to damage to the scintillation light production. Based on our results and conservative estimates of the expected dose in a clinical context, a scintillating phantom used for proton therapy treatment plan verification would exhibit a systematic light yield reduction of approximately 0.1% after a year of operation.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC00112704
OSTI ID:
1224191
Report Number(s):
BNL-108459-2015-JA; R&D Project: PO-022; KA2201020; TRN: US1500788
Journal Information:
Journal of Instrumentation, Vol. 10, Issue 10; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (11)

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Preliminary investigations on the determination of three-dimensional dose distributions using scintillator blocks and optical tomography: 3D dosimetry by scintillator and optical tomography journal July 2013
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A new water-based liquid scintillator and potential applications
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journal December 2011
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6　Treatment Planning [6　治療計画] journal January 2015
8 Estimation and Presentation of Uncertainty in the Delivered Dose journal December 2007
UV-VIS and FTIR spectral studies of CR-39 plastics irradiated with X-rays journal January 1997

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
proton therapy
dose verification
water equivalence
water-based liquid scintillator