Work

Effect of gamma radiation on the optical and color properties of cellulose triacetate for the application in radiation dosimetry

Year: 2025

Type: article

Abstract: One polymer that has been effectively used in the dosimetry field is cellulose triacetate (CTA). Cellulose CTA film samples were exposed to a range of γ-ray dosages, from 10 to 75 kGy. The ensuing effects of the γ ray irradiation on the optical and color properties of the produced CTA films were examined using UV-vis spectroscopy and the International Commission on Illumination (CIE) color alterations technique. The direct bandgap dropped from 5.25 to 3.91 eV when the dosage was increased to 75 kGy. The Urbach energy rose from 0.35 to 0.73 eV, indicating the opposite trend. The predominance of chain crosslinks is responsible for this. Additionally, the nature of the microelectronic transitions was detected with the help of the optical dielectric loss (ε”). Direct allowed transitions were discovered in the CTA films. The effects of the γ-ray on the CTA films' light absorbance, extinction coefficient, refractive index, and optical conductivity were also examined. Additionally, the optical color differences between the irradiated and pristine films were identified. The non-irradiated CTA film had no color. When exposed to radiation dosages of up to 75 kGy of γ rays, it displayed notable color changes.

Source: Journal of Radiation Research and Applied Sciences

DOI: 10.1016/j.jrras.2025.101507

Author: Merfat Algethami

Institution: Taif University

Language: English

Topic: Polymer Nanocomposite Synthesis and Irradiation

Subfield: Polymers and Plastics

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,400

Funder: Taif University