Abstract
The bulk-etch rates of a newly developed track detector which is a copolymer of N-allyloxycarbonyl diethanolamine-bis allylcarbonate (NADAC) and allyl diglycol carbonate (ADC) [NADAC-ADC (1:1, w/w)] have been determined at different temperatures to deduce its activation energy. The energy of activation is found to be (0.93 ± 0.07) eV. This compares very well with the values of activation energy reported in the literature for the most commonly used nuclear track detectors. The effects of gamma irradiation on this new detector in the dose range of 47.0–145.0 kGy have also been studied using bulk etch, UV–visible spectroscopic, and thermogravimetric analysis (TGA) techniques. The activation energy for bulk etching calculated from bulk etch rates measurements at different temperatures, optical band gaps determined from the UV–visible spectra, and the values of onset temperature of decomposition (T0) calculated from TGA curves were found to decrease with the increase in gamma dose. These results have been explained on the basis of scission of the detector due to gamma irradiation.
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Acknowledgments
One of the authors (Vivek Chavan) is thankful to Department of Atomic Energy, India for granting JRF under Ph.D. collaborative Programme between BARC, and University of Mumbai. The authors are also thankful to Dr. V·K.Manchanda, Head, RCD, BARC, Mumbai and Dr. V.S. Nadkarni,Goa University,Goa for useful discussions and encouragement.
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Chavan, V., Kalsi, P.C. & Mhatre, A. The etching, optical and thermal response of a newly developed nuclear track detector called NADAC-ADC copolymer to gamma-irradiation. J Radioanal Nucl Chem 287, 273–276 (2011). https://doi.org/10.1007/s10967-010-0673-7
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DOI: https://doi.org/10.1007/s10967-010-0673-7