Sucrose as double-signal high-dose dosimeter for ionizing radiation

A possibility to use chemically pure sucrose as double-signal (EPR+UV) dosimeter for high doses of gamma radiation was checked. Sucrose (as obtained) was irradiated in solid state and one part of the sample was analyzed by EPR and the second one by optical method. In a range 5–50 kGy both signals were linearly dependent on an absorbed dose. Additionally, a linear correlation between EPR and optical signal was observed. EPR signal (peak-to-peak amplitude) decreased slowly with time (some percent during the first 11 weeks). The decay was slightly dose depended. Optical signals were measured after dissolution of irradiated sucrose in triple distilled water. An absorption band with maximum at 263 nm was chosen as dosimetric signal. Its intensity increased slowly with time (about 5% during the first day). The heating procedure proposed in literature for UV signal stabilization was checked but it was not recommended for a routine use.