Characterization of the new free-air primary standard for low-energy X-rays at CMI

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F14%3A%230000861" target="_blank" >RIV/00177016:_____/14:#0000861 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0969806X14000681" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0969806X14000681</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.radphyschem.2014.03.001" target="_blank" >10.1016/j.radphyschem.2014.03.001</a>

Result language
angličtina
Original language name
Characterization of the new free-air primary standard for low-energy X-rays at CMI
Original language description
In 2011 a decision was made by Czech Metrology Institute to build a free-air ionization chamber (FAC) intended to be used as a primary standard of air kerma rate for low-energy X-rays (photon energy below 50 keV, including mammography X-ray qualities) inorder to replace the currently used secondary ionization chamber and to decrease the uncertainty of air kerma reference value. In the period 2011?2012, the FAC has been designed, manufactured and put into operation. Its performance was tested using a calibrated secondary chamber and then by an informal comparison with a national primary standard of BEV (Austria). Physical characteristics of the FAC are described and individual correction factors are discussed focusing on computational methods utilizedin their estimation. Summary of the correction factors with the uncertainty budget is presented.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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