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Feasibility study of a portable and fast spatial dosimeter using an alcohol-based liquid scintillator and a digital camera


In this paper, we propose a portable and fast spatial dosimeter that uses an alcohol-based liquid scintillator (AbLS) and a digital camera. As a new detection liquid for the liquid scintillator, a mixture of alcohol and water was used. Alcohol has both lipophilic and hydrophilic properties, and it has a reasonable solubility for fluor. The development of an alcohol-based liquid scintillator is briefly described, and then, a photo image analysis for a beam-path-length (range) is introduced. Through the range images taken using digital camera (even mobile phone camera), the fluor component dissolved in the alcohol-based liquid scintillator could be determined. For the incident beam, electron beam energies of 6–12 MeV generated using a linear accelerator (LINAC) to irradiate the sample. The results obtained using the colorimetry technique for the digital images to transform color space to wavelength of the fluor emitted were analyzed. In the future, this method can be used to estimate the emission spectrum in the visible region as an auxiliary to the conventional spectrophotometer.

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This work was supported by grants from the National Research Foundation (NRF) of the Korean government (2019R1A2B5B01070451), and Chonnam National University (2021-1752, C-STAR).

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Correspondence to Ji Young Choi, Byoung Chan Kim or Kyung Kwang Joo.

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Choi, J.W., Choi, J.Y., Kim, B.C. et al. Feasibility study of a portable and fast spatial dosimeter using an alcohol-based liquid scintillator and a digital camera. J. Korean Phys. Soc. 79, 810–817 (2021).

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  • Liquid scintillator
  • Alcohol
  • Electron beam
  • Beam-path-length
  • Percent depth dose
  • Phantom
  • Novalis Tx
  • Digital camera
  • Mobile phone
  • Image analysis
  • Medical physics