Evaluation of thermal neutron dose from Am-Be source using gelatinized boron fricke dosimeter. (September 2019)

• Record Type: Journal Article
• Authors: Aboelezz, E.; Abdelgawad, Mahmoud H.; Eman, S.A.; Hassan, G.M.
• Is Part Of: Radiation physics and chemistry. Volume 162(2019:Sep.)
• Page Start: 131
• Page End: 135
• Publication Date: 2019-09
• Subjects: Fricke gel -- Dosimetry -- Thermal neutron -- Detection limit; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2019.04.037
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: In the current work, we focused on the evaluation of thermal neutron doses in mixed gamma/thermal neutron field using borated Fricke gel with 23 ppm of 10 B isotope. The dose response using two measuring protocols and the optical density stability of borated-Fricke gel (BFG) dosimeter were studied for low dose rate of thermal neutron beam from Am-Be source. The performance parameters of BFG were calculated where the critical level and the detection limit were found to be 7 and 13 mGy, respectively. The radiation yield for BFG was found to be 338 ions per 100 eV of thermal neutron dose. This kind of gels may help in the dosimetry of thermal neutrons used in boron neutron capture therapy technique and also in the industrial applications. Highlights: Molar extinction coefficient of BFG for thermal neutron dose was estimated. G(Fe 3+ ) of BFG for thermal neutron dose was found to be 338 ions/100 eV. Optical absorbance stability of BFG for thermal neutron was studied. Detection limit dose of BFG was found to be 13 mGy.