title: Evaluation of the dose rate distribution for an air-type 60Co irradiation facility.
abstract: The dose rate distributions in the 29,000-Ci 60Co irradiation facility in National Tsing Hua University were investigated by measurements and calculations. The dose rate measurements were performed using radiochromic dye films and an Exradin A2 ion chamber mounted on a PC-controlled motorised vertical translation stage. The calculations were made by using the three-dimensional point kernel code QAD-CGGP with detailed source composition and geometry modelling. The scattered gamma rays from the walls of the irradiation cell were also evaluated by using the Monte Carlo code MCNP.
authors.affiliation: Department of Engineering and System Science, National Tsing Hua University, Hsinchu 300, Taiwan, Republic of China.
authors.forename: W C
authors.initials: WC
authors.lastname: Tsai
authors.forename: R D
authors.initials: RD
authors.lastname: Sheu
authors.forename: S H
authors.initials: SH
authors.lastname: Jiang
mesh_terms: D000388:Air; D003037:Cobalt Radioisotopes / Q000032:analysis*; D003198:Computer Simulation; D019544:Equipment Failure Analysis; D015233:Models, Statistical; D009010:Monte Carlo Method; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity
chemical_list: D003037:Cobalt Radioisotopes