Study of Some Synthesized Chemical Sensors for Radiation Processing Dosimetry

Abstract

Radiochromic film dosimeters have wide-spread applications in radiation technology applications for γ-rays, X-rays and electron beam (EB) irradiation such as radiotherapy, blood irradiation and radiation processing of foods and medical devices. Radiation dosimetry is a very crucial tool for such applications. Thus, radiochromic film dosimeters have been developed for low- and high-dose monitoring in a wide radiation application for dose monitoring. Developing new types of films is due to the effort of looking for finding more reliable, more accurate, more stable, simple, and less expensive dosimeters. Many radiochromic films like GAFCHROMIC Dosimetry film media and radiation indicators are mostly depending on conjugated diacetylene monomers and polydiacetylenes polymers. Since these compounds are greatly sensitive to radiation and polymerize upon γ-ray exposure forming highly colored polyconjugated polymers, they are being successfully used in γ-rays and EB radiation dosimeters.

Continuous research and development in the dosimetry systems that allow full imaging of a radiation dose distribution especially in radiation therapy has led to the development of radiation-sensitive (radiochromic) gels. Radiochromic gel dosimeters are fabricated from radiation sensitive chemicals, which, upon irradiation, exhibit change in color intensity as a function of radiation dose. These gel dosimeters are radiologically soft-tissue equivalent, which have properties enabling the gels to be modified depending on the radiotherapy applications.