ESR spectrometric characterization of the methyl viologen dosimeter in poly(vinyl alcohol) film |
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| Affiliation: | 1. Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático José Beltrán 2, 46980 Paterna (València), Spain;2. Laboratorio de Rayos X y Materiales Moleculares (MATMOL), Departamento de Física, Facultad de Ciencias, Universidad de La Laguna, E-38200 La Laguna (Tenerife), Spain;1. Department of Molecular and Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA;2. Department of Statistics, Bioinformatics Research Center, North Carolina State University, Raleigh, NC, USA;3. Morrisville Cat Hospital, Morrisville, NC, USA;1. Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, China;2. Key Laboratory on Resources Chemicals and Material of Ministry of Education, Shenyang University of Chemical Technology, Shenyang 110142, China;3. Institute of Organic Chemistry, Romanian Academy, P. O. Box 35-108, Bucharest 060023, Romania;1. Vertox Laboratory, Defence Research and Development Establishment, Gwalior 474002, India;2. School of Studies in Chemistry, Jiwaji University, Gwalior 474002, India |
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| Abstract: | A dosimeter of poly(vinyl alcohol) (PVA) film containing methyl viologen dichloride (MV2+ (Cl-)2) was characterized by means of ESR and u.v. spectrometries. γ-irradiation of the MV2+-PVA dosimeter induced one-electron reduction of MV2+· to thecation radical (MV+), thus giving rise to blue coloration. The resulting MV+· showed an ESR signal with a g-factor of 2.0031. The yield of MV+· at a given radiation dose was estimated from duplicate integral of the ESR first-derivative spectra by reference to 1,1'-diphenyl-2-picrylhydrazyl (DPPH). The yield of MV+· thus estimated increased linearly with increasing the radiation dose up to about 1.4 Mrad. The ESR spectrometry of MV+· showed a linear correlation with the u.v. spectrometric method reported previously. |
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