Dosimetric characterization of a Nickel complex for routine use in radiation processing

Feasibility of utilizing radiochromic nickel complex gel for radiation processing

“…The square of the correlation coefficients was found to be 0.99 for three samples (table 2). Comparing the results with a previously published study on the Ni/DPCO liquid solution system shows a reduction in the minimum detectable dose down to 10 Gy compared with 20 Gy after adding gelatin [24]. Gelatin enhanced the sensitivity of the dyed gel mixture.…”

“…A gel sample based on the metal complex of nickel nitrate and DPCO ligand was investigated spectrophotometrically at 𝜆 max (maximum wavelength) of 535 nm for possible use as a radiation dosimeter. The results were compared with Ni/DPCO liquid form [24]. Three sample concentrations were prepared in acetone/ethanol/distilled water solvent and irradiated by two 60 Co sources with 1.17 and 0.06 Gy/s dose rates.…”

“…A liquid Ni/DPCO metal complex dosimeter was previously proposed for the 20-1000 Gy dose range and stability of 10 days before and after the irradiation. The repeatability of the liquid Ni/DPCO dosimeter was 4.12 [24]. Since physiological processes such as the ripening of fruits can be delayed in the dose range of 10-1000 Gy [25], the present study tries to extend the stability and the linear range of the response curve by chelating agents in gel matrix instead of liquid form in the previous work [24].…”

“…The repeatability of the liquid Ni/DPCO dosimeter was 4.12 [24]. Since physiological processes such as the ripening of fruits can be delayed in the dose range of 10-1000 Gy [25], the present study tries to extend the stability and the linear range of the response curve by chelating agents in gel matrix instead of liquid form in the previous work [24]. The use of the gelatin in the Ni/DPCO complex solution in this work was for the spatial stabilization of ions to increase the sensitivity of the dosimeter in the low dose range as a routine dosimeter.…”

“…In table 5, the dosimetric parameters of the Ni/G/DPCO gel dosimeter are compared with some available parameters of other dosimeters introduced in this field. The results show an extended linear dose range, acceptable stability, easy operation, and low cost compared to Ni/DPCO liquid, Cr/DPC gel, FAC gel, and SK gel dosimeters [10,[22][23][24].…”