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A versatile radiochromic dosimeter for low‐medium gamma radiation and its application to food irradiation
Author(s) -
Lopes Franceline Aparecida,
Ferreira Giovana Ribeiro,
Franco Marcella Rocha,
Schimitberger Thiago,
de Faria Luiz Oliveira,
Bianchi Rodrigo Fernando
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45729
Subject(s) - dosimeter , materials science , radiation , irradiation , optoelectronics , fluorescence , food irradiation , optics , common emitter , substrate (aquarium) , physics , oceanography , nuclear physics , geology
This article presents a novel radiochromic film for selective detection of low‐medium (0–10 kGy) gamma radiation ( 60 Co) doses. This dosimeter is based on a printed fluorescent multilayer structure comprising a paper substrate having layers of copper phthalocyanine (DY220) (a green emitter material) on the bottom, and layers of poly[2‐methoxy‐5(2′‐ethylhexyloxy)‐ p ‐phenylenevinylene] (MEH‐PPV) (a green‐light absorber, red emitter, and radiation sensitive polymer) on the top. The effect of gamma radiation on the optical properties of DY220/MEH‐PPV was described: it was observed as a strong correlation between radiation dose and fluorescent, color coordinates for CIE (1931) chromatic diagram, and Pantone color reference of the dosimeter. The rate of these changes can be altered by manipulation of top–bottom layers to represent easily the radiation dose to be determined in a wide range. This versatile dosimeter has many uses in the field of food radiation for monitoring, quality assurance, and control of the gamma radiation process. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45729.