The influence of gamma radiation on organic compounds having carbon ring and its application in dosimetry

摘要

The formation of highly oxidizing radicals in multifunctional-solid compounds upon irradiation with gamma-ray had been investigated. Five organic compounds having a single carbon ring had been used in the present investigation; these materials are 1-chloro-4-nitrobenzene, 4'-aminoacetophenone, 3'-hydroxyacetophenone, n-anthranilic acid, and triphenylmethane. These material were irradiated using Co-60 radiation with different doses between 20 and 100 kGy. Electron spin resonance spectroscopy spotted increases of the resonance absorption having lande factor around 2.0113 +/- 0.003 upon irradiation with the increasing of dose. This resonance absorption was related to the formation of long-lived oxygen radicals that were attached to one of the radiation synthesized compounds. The method of infrared absorption spectroscopy emphasized the formation of cyclic and aliphatic hexane in addition to the active oxygen radicals. n-Anthranilic acid was found to be suitable for radiation the dosimetry with long-lasting radiation signature as electron spin and also to determine the exposure dose. The time-lapse infrared and electron spin resonance measurements had been used to tracked the formation of active species within the timelapsed after the end of exposure; results showed that the dosimetric signature may be used as a tracker for the time when the exposure happens.