An international journal published by K. N. Toosi University of Technology

Document Type : Research Article


1 Department of Physics, Faculty of Sciences, Arak University, P.O. Box 8349-8-38156, Arak, Iran

2 Radiation Applications Research School, Nuclear Science and Technology Research Institute, AEOI, P.O. Box 11365-3486, Tehran, Iran



In this paper, the spectrophotometric properties of a colored Nickel-based solution complex (Nickel nitrate hexahydrate and Methyl Orange (MO)) were investigated as a stable chemical dosimeter for using in radiation processing of agricultural products. Its simple synthesis method as well as low cost made it a suitable dosimeter for use in radiation processing. The variation of absorbed dose was applied to measure the absorbed dose. The maximum absorbance for the solution was observed at 460 nm. This solution was irradiated at three different concentrations of Ni(No3)2.6H2O and MO by Co-60 gamma-ray. Also the variation of the absorbance as a function of PH of the solution was investigated. The results showed the solution absorbance decreases with an increase in doses, and this solution can be used as a routine dosimeter and has a linear response in the 50 to 1500 Gy range with acceptable stability in environmental conditions up to 40 days before and after irradiation.


  • A Ni/Mo solution was investigated as routine dosimeter for use in radiation processing.
  • The dose response of Ni/Mo solutions was linear in the range of 50 to 1500 Gy.
  • This solution was proposed as a simple construction and low cost routine dosimeter.


Main Subjects

Abdel-Fattah, A., Beshir, W., Hassan, H., et al. (2017). Radiation-induced coloration of nitro blue tetrazolium gel dosimeter for low dose applications. Radiation Measurements, 100:18–26.
Adachi, M., Bredow, T., and Jug, K. (2004). What is the origin of color on metal complex dyes? Theoretical analysis of a Ni-coordinate azo dye. Dyes and Pigments, 63(3):225–230.
Aldweri, F. M., Rabaeh, K. A., and Al-Ahmad, K. N. (2017). Novel radiochromic dosimeters based on Calcein dye for high dose applications. Radiation Physics and Chemistry, 139:1–4.
ASTM (2004). Standard Guide for Estimating Uncertainties in Dosimetry for Radiation. In ISO ASTM 51707. ASTM intrnational, Geneva.
ASTM (2013). Practice for using the fricke reference standard dosimetry system, ASTM standard practice E1026. In Annual Book of ASTM Standards. ASTM International West Conshohocken, PA.
Babaei, V., Pourimani, R., Kashian, S., et al. (2022). Dosimetric characterization of a Nickel complex for routine use in radiation processing. Applied Radiation and Isotopes, 179:110016.
Beshir, W., Eid, S., Gafar, S., et al. (2014). Application of solutions of Rhodamine B in dosimetry. Applied Radiation and Isotopes, 89:13–17.
Day, M. and Stein, G. (1957). The action of ionizing radiations on aqueous solutions of methylene blue. Radiation Research, 6(6):666–679.
Gafar, S. and El-Ahdal, M. (2016). Radiochromic fuchsine-gel and its possible use for low dosimetry applications. Advances in Polymer Technology, 35(2):146–151.
Lawrance, G. A. (2013). Introduction to coordination chemistry. John Wiley & Sons.
McLaughlin, W., Humphreys, J., Hocken, D., et al. (1988). Radiochromic dosimetry for validation and commissioning of industrial radiation processes. International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, 31(4-6):505–514.
Rabaeh, K. and Basfar, A. (2020). Optical evaluation of dithi- zone solution as a new radiochromic dosimeter. Pigment & Resin Technology, 49(4):249–253.
Rabaeh, K. A., Moussa, A. A., Basfar, A. A., et al. (2013). Novel radio-chromic solution dosimeter for radiotherapy treatment planning. Physica Medica, 29(4):374–378.
Siddalingaiah, A. and Naik, S. G. (2001). Synthesis, characterization, and thermal studies on cobalt (II), nickel (II), and zinc (II) complexes of di (3, 5-dichlorophenyl)-carbazone. Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 31(9):1675–1688.
Spinks, J. W. and Woods, R. J. (1990). An introduction to radiation chemistry.