Speaker
Description
One of the most crucial elements in following reasonable radiation procedures is calibrating and measuring the radiation doses to ensure the process is done correctly. Due to its small size and precise requirements for its dose-measuring equipment, the B3 dosimeter—a radiochromic film made of polyvinyl butyral (PVB) resin mixed with the radiochromic dye (pararosaniline)—is being used more frequently to measure absorbed doses in radiation on practices for both gamma and electron beam (EB) facilities. We carried out an in-plant calibration of the dosimetry system by using the EB to irradiate the B3 film dosimeters at the MEVEX LINAC EB facility. We then compared it to the alanine dosimetry supplied and provided by the Ris High Dose Reference Laboratory (HDRL) as the reference standard. The findings showed that the relative variation was within the allowed limit (about 3.0 percent in the intended range of 2.0-10.0 kGy) between the values of absorbed doses acquired with our dosimeter and the transfer standards dosimeter assessed by HDRL. Additionally, 180 days of storage did not affect the post-irradiation stability of B3 film dosimeters. It has been proposed that the B3 film dosimetry could be used in routine radiation processing at the MEVEX LINAC EB facility with the investigated dose range for quality assurance of the irradiated products, especially foods and foodstuffs processed under the 10 MeV EB accelerator at the MEVEX LINAC EB facility.
Keywords: B3 dosimeter, electron beam radiation, MEVEX LINAC, in-plant calibration.