Abstract
CR-39 Solid State Nuclear Track Detecting foils (SSNTD), along with 1 mm thick polyethylene radiator, sealed in triple laminated pouches, are used for country wide Fast Neutron Personnel Monitoring in India. With the present system of processing by elevated temperature electrochemical etching (ETECE) and evaluation using automatic image analysis, only 16 foils are processed at a time and it is useful over the dose equivalent range 0.2 mSv to 10 mSv. It has been reported that, by processing CR-39 of good detection efficiency by chemical etching at elevated temperature, more numbers of foils can be processed simultaneously.
In the present study, CR-39 foils from Pershore Moulding (UK) have been chemically etched using 7 N KOH under various conditions of temperature and etching durations and evaluated using high magnification microscope. The duration of chemical etching, has been optimized at a constant temperature of 60°C for chemical etching process. The characteristics of the chemically etched CR-39 foils are compared with the characteristics of the CR-39 foils processed by the existing system of ETECE and the detailed results are presented in the full text of the paper. It has been observed that by chemical etching process, the dose equivalent range of CR-39 foils can be extended above 60 mSv.
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References
R J Tanner, D T Bartlett, and L G Hager Radiation Measurements 40 549 (2005)
M P Dhairyawan, P K Marathe and O P Massand Radiation Measurements 36 435 (2003)
J R Harvey and A R Weeks Radiation Protection Dosimetry 20 89 (1987)
J R Harvey, A P French, M Jackson, M C Renouf and A R Weeks Radiation Protection Dosimetry 70 149 (1997)
Y V Rao, S Kar, G Valli, D G Joshi, V K Chaddaa, R K Nigam, O P Massand, M P Dhairyawan and P K Marathe Image Analysis System for Automation in Fast Neutron Personnel Monitoring using CR-39 Solid State Track Detector, International Conference on Automation ICAUTO-95 (Indore, India) (1995)
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Sathian, D., Rohatgi, R., Jayalakshmi, V. et al. Use of chemical etching of CR-39 foils at elevated temperature for fast neutron personnel monitoring in India. Indian J Phys 83, 863–869 (2009). https://doi.org/10.1007/s12648-009-0041-z
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DOI: https://doi.org/10.1007/s12648-009-0041-z