التفاصيل البيبلوغرافية
| العنوان: |
Improvement of 93mNb and 103mRh activity measurement methodology for reactor dosimetry. |
| المؤلفون: |
Riffaud, J., Lépy, M.-C., Domergue, C., Philibert, H., Destouches, C., Thiollay, N., Girard, J. M. |
| المصدر: |
EPJ Web of Conferences; 2017, Vol. 153, p1-7, 7p |
| مصطلحات موضوعية: |
RADIATION dosimetry, MONTE Carlo method, SPECTROMETRY, LIQUID scintillation counting, PHOTON emission |
| مستخلص: |
Reactor dosimetry is based on the analysis of the activity of irradiated dosimeters, such as 93mNb and 103mRh. The activity measurement of these dosimeters is conventionally performed by X-ray spectrometry, but the low-energy of emitted photons makes it difficult to derive reliable results with low uncertainties. Approaches to improve these characterisations are presented: they include high accuracy efficiency calibration of a HPGe detector using both experiments and Monte Carlo simulation, calculation of corrective factors for the geometry (selfabsorption) and self-fluorescence effects. Improvement of the knowledge of the 103mRh decay scheme is also required and a specific experiment is proposed, including activity measurement of a 103mRh solution by liquid scintillation, and measurement of the photon emission intensities by X-ray spectrometry. A method for calculating coefficients to take into account the self-fluorescence effects in dosimeters is also suggested to improve the uncertainties on activity measurements. [ABSTRACT FROM AUTHOR] |
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