Enhancement in dose sensitivity of polymer gel dosimeters composed of radiation-crosslinked gel matrix and less toxic monomers

8th International Conference on 3D Radiation Dosimetry

Hiroki, A.^1 ; Yamashita, S.^2 ; Taguchi, M.^1

Environmental Radiation Processing Group, Quantum Beam Science Center, Japan Atomic Energy Agency, Takasaki, Gunma

370-1292, Japan^1

Nuclear Professional School, School of Engineering, University of Tokyo, Tokai-mura, Naka-gun, Ibaraki

319-1188, Japan^2

关键词: 2-hydroxyethyl methacrylate;    Crosslinked;    Dimethacrylates;    Dose response;    Dose sensitivity;    Hydroxypropyl cellulose;    Polymer gel dosimeter;    UV-Vis spectrophotometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/573/1/012028/pdf
DOI  :  10.1088/1742-6596/573/1/012028

来源: IOP

【 摘 要 】

Polymer gel dosimeters based on radiation-crosslinked hydroxypropyl cellulose gel were prepared, which comprised 2-hydroxyethyl methacrylate (HEMA) and polyethylene glycol #400 dimethacrylate (9G) as less toxic monomers and tetrakis (hydroxymethyl) phosphonium chloride (THPC) as an antioxidant. The dosimeters exposed to60Co γ-rays became cloudy at only 1 Gy. The irradiated dosimeters were optically analyzed by using a UV- vis spectrophotometer to evaluate dose response. Absorbance of the dosimeters linearly increased in the dose range from 0 to 10 Gy, in which dose sensitivity increased with increasing 9G concentration. The dose sensitivity of the dosimeters with 2 wt% HEMA and 3 wt% 9G was also enhanced by increment in THPC.