AI Article Synopsis
- The study compared two neutron dosimetry systems: PADC detectors and Al2O3:C,Mg FNTDs, using irradiations from 252Cf and 241Am-Be sources.
- Results showed a general agreement between both systems, with differences ranging from an average of 1.5% to a maximum of 22% for doses above 1 mSv.
- A calibration error in one test led to inflated dose readings, highlighting the need for improved algorithms in FNTD track analysis while confirming the technology's feasibility.
Article Abstract
The objective of this study was to compare a neutron dosimetry system based on polyallyl diglycol carbonate (PADC) detectors with a new system based on Al2O3:C,Mg fluorescence nuclear track detectors (FNTD). The irradiations, performed as part of an intercomparison organized by the Physikalisch-Technische Bundesanstalt (PTB), Germany, were on a PMMA phantom with 252Cf or 241Am-Be source, usually with the phantom surface perpendicular to the radiation beam (0° angle), and with Hp(10) values between 0.3 and 7 mSv. One 252Cf irradiation was performed at 30° angle, and one with an additional 1 mSv gamma irradiation. The results showed an agreement between the two techniques with an average and maximum difference between PADCs and FNTDs of 1.5 and 22%, respectively, if one compares only cases of doses >1 mSv. For one of the irradiation conditions with dose of 0.9 mSv, use of the incorrect calibration factor for the FNTD (252Cf instead of 241Am-Be) led to reported values ~×2 larger than the given doses, due to low statistics in the determination of the ratio between 6Li-doped glass and polyethylene neutron converters. Although the FNTD track analysis algorithm may need further development, the results presented here demonstrate the feasibility of the FNTD technology and indicate areas requiring improvements.
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| http://dx.doi.org/10.1093/rpd/ncx171 | DOI Listing |
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