Effects of neutron irradiation on optical and chemical properties of CR-39: Potential application in neutron dosimetry |
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| Affiliation: | 1. Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India;2. Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India;3. Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India;1. Ho Chi Minh City University of Industry, 12 Nguyen Van Bao Street, Go Vap District, Ho Chi Minh City, Vietnam;2. Ho Chi Minh City University of Technical Education, 1 Vo Van Ngan, Thu Duc Street, Ho Chi Minh City, Vietnam;1. Nuclear Science and Technology Research Institute (NSTRI), Tehran 14395-836, Iran;2. School of Physics, Damghan University, Damghan 36716-41167, Iran;1. Nuclear Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil;2. Mechanical Engineering Program, State University of Rio de Janeiro, Nova Friburgo, Brazil;3. Geological Department, State University of Rio de Janeiro, Rio de Janeiro, Brazil |
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| Abstract: | Effects of high-dose neutron irradiation on chemical and optical properties of CR-39 were studied using FTIR (Fourier Transform Infrared) and UV–vis (Ultraviolet–Visible) spectroscopy. The primary goal was to find a correlation between the neutron dose and the corresponding changes in the optical and chemical properties of CR-39 resulted from the neutron irradiation. The neutrons were produced by bombarding a thick Be target with 22-MeV protons. In the FTIR spectra, prominent absorbance peaks were observed at 1735 cm−1 (C O stretching), 1230 cm−1(C–O–C stretching), and 783 cm−1(C–H bending), the intensities of which decreased with increasing neutron dose. The optical absorbance in the visible range increased linearly with the neutron dose. Empirical relations were established to estimate neutron doses from these optical properties. This technique is particularly useful in measuring high doses, where track analysis with an optical microscope is difficult because of track overlapping. |
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| Keywords: | CR-39 Neutron dosimetry UV–vis spectrophotometry FTIR |
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