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

A Hiroki, S Yamashita, M Taguchi
2015 Journal of Physics, Conference Series  
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 to 60 Co γ-rays became cloudy at only 1 Gy. The irradiated dosimeters were optically analyzed by using a UVvis spectrophotometer to evaluate dose response. Absorbance of the
more » ... ers 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.
doi:10.1088/1742-6596/573/1/012028 fatcat:nuh5jps57jd3nexuh2acxrt5aa