Title: Dose response of polyvinyl alcohol films dyed by methyl red under gamma irradiation

Authors: Nguyen Trieu Tu, Nguyen Van Dung, Tran Dai Nghiep

Addresses: College of Sciences, Hanoi National University, 334 Nguyen Trai Road, Hanoi, Vietnam. ' College of Sciences, Hanoi National University, 334 Nguyen Trai Road, Hanoi, Vietnam. ' Institute for Nuclear Science and Techniques, P.O. Box 5T-160, Hoang Quoc Viet Road, Hanoi, Vietnam

Abstract: Polyvinyl Alcohol (PVA) films containing Methyl Red (MR) were prepared by the cast drying of an aqueous solution of the constituents. Irradiation was performed in air at room temperature with 60Co gamma rays at a dose rate of 0.9 kGy/h. The characteristics of the films were analysed by a spectrophotometer and densitometer. The dose response of the films was described by the energy transfer model. The sensitivity of the films was determined. The film is recommended for use in gamma dosimetry, gamma radiation protection and accident analysis.

Keywords: dose response; PVA films; absorbance; optical density; radiation protection; energy transfer model; polyvinyl alcohol; methyl red dyes; gamma irradiation; gamma dosimetry; gamma radiation protection; accident analysis.

DOI: 10.1504/IJLR.2009.028886

International Journal of Low Radiation, 2009 Vol.6 No.3, pp.177 - 184

Published online: 11 Oct 2009 *

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