Chemical Dosimetry System for γ-Ray Irradiation Based on the Formation of Phenol from Aqueous Benzene Solutions

Phenol Formation in Gamma Radiolysis of Aqueous Benzene Solution with Sodium Hypochlorite

“…In this paper, the radiation doses are given as the absorbed doses in water. These details have been reported previously …”

“…Without sodium hypochlorite, the phenol formations were not effected by the presence of sodium chloride (chloride ions) in this concentration range. As mentioned before, 14 interference by coexisting salts and solvents is understood in terms of quenching reactions of hydroxyl radicals by coexistences. The scavenging reactions of hydroxyl radical by chloride ion are negligible comparing with the reaction between benzene and the hydroxyl radical in the experimental conditions used ([benzene] = 2 mM and [Cl − ] = 0.17−34 mM).…”

“…12,13 We have applied the technique to the benzene dosimetry system and demonstrated a linear increase of phenol in aerated benzene solutions to 100Gy. 14 The lower limit of dose detection, calculated from the detection limit of phenol of the system, was estimated to be 0.007 Gy; this is two or more orders more sensitive than chemical dosimeters currently in use. The phenol formation rates are not affected by the oxygen concentration in the benzene solutions, and chemical stability of the system before and after irradiation was good.…”

“…The authors and co-workers have investigated a simple and highly sensitive determination technique for hydroxyl radicals photochemically generated in environmental water using benzene and fluorescence HPLC. , We have applied the technique to the benzene dosimetry system and demonstrated a linear increase of phenol in aerated benzene solutions to 100Gy . The lower limit of dose detection, calculated from the detection limit of phenol of the system, was estimated to be 0.007 Gy; this is two or more orders more sensitive than chemical dosimeters currently in use.…”