Ultraviolet Ray Strength for Pre-irradiation in Gafchromic EBT2

Ultraviolet (UV) rays strength and density change of Gafchromic EBT2 were investigated. It has previously been suggested that UV rays can be used as a substitute for the X-ray double-irradiation technique to correct non-uniformity errors when using Gafchromic EBT2. Here, the appropriate strength of the UV-A rays for irradiating the active layer of Gafchromic EBT2 was investigated.