Dosimetric characteristics of a Radiochromic polyvinyl butyral film containing 2,4-hexadiyn-1,6-bis(n-butyl urethane)

• A new thin film based on 2,4-hexadiyn-1,6-bis(n-butyl urethane) is developed.
• The film is suitable for industrial dosimetry in the 3–150 kGy range.
• Overall uncertainty of dose measurements does not exceed 6.9% (2σ).

A radiation-sensitive compound 2,4-hexadiyn-1,6-bis(n-butyl urethane) (HDDBU) was synthesized, characterized by FTIR spectroscopy, and introduced into a thin polyvinyl butyral film to form a radiation dosimeter for industrial irradiation facilities. The monomer polymerizes under gamma radiation, inducing change in the film spectrum in the range of 200–400 nm. According to XRD spectroscopy, the film contains monomeric HDDBU in a non-crystalline state. The dose response function, radiation sensitivity, and dependences of the response on environmental factors were studied. Uncertainty of dose measurements with the proposed dosimetry system was analyzed in detail.