IEAP - Institute of Experimental and Applied Physics CTU - Czech Technical University in Prague
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IEAP - Institute of Experimental and Applied Physics CTU - Czech Technical University in Prague
CTU - Czech Technical University in Prague
Partial tasks  > X-ray flourescent imaging
X-ray flourescent imaging

X-ray fluorescence (XRF) is known method for the material elemental composition analysis. Usually, high quality spectroscopic detectors are used for precise elemental analysis, however it is very difficult to obtain information about spatial distribution of elements. To get an image of a spatial distribution of elements contained in the specimen we use the Medipix or TimePix pixel detectors.
In our setup, the tested sample is iluminated by an X-ray tube. The Timepix pixel detector with pinhole aperture is used. Energy resolution of the Timepix device is approx. 3 keV, which is not sufficient for full elemental analysis. If global elemental composition of the specimen is known (or it can be estimated) and if calibration of response of each Medipix pixel to fluorescence spectrum of each of these elements is done, then it is possible to retrieve the distribution of elements in the sample using spectrum decomposition technique.
Medipix2 detects X-rays particles with minimal energy approx. 3keV. That is why it is possible get an image of spatial distribution of elements with atomic number greater than 19 (potasium). It is possible to resolve elements with difference in the atomic number of 1.

Responsible person


Number Name Agency
1P04LA211 Collaboration Czech Republic with CERN MŠMT
MSM 6840770040 Research Program 40: Usage of radionuclides and ionizing radiation. MŠMT

Articles in Impacted Journals
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Ocenění Name Author Scientific journal OceněníYear
Mobile system for in-situ imaging of cultural objects Žemlička J.; Jakůbek J.; Krejčí F.; Hradil D.; Hradilová J.; Mislerová H. Journal of Instrumentation 7 C01108 2012
Analysis of painted arts by energy sensitive radiographic techniques with the Pixel Detector Timepix Žemlička J.; Jakůbek J.; Kroupa M.; Hradil D.; Hradilová J.; Mislerová H. Journal of Instrumentation 6 C01066, doi: 10.1088/1748-0221/6/01/C01066 2011
X-Ray Fluorescence Imaging With the Medipix2 Single-Photon Counting Detector Uher J.; Harvey G.; Jakůbek J. IEEE Transactions on Nuclear Science, Vol. PP, Issue: 99, doi: 10.1109/TNS.2011.2173352 2011
Energy and Position Sensitive Pixel Detector Timepix for X-Ray Fluorescence Imaging Žemlička J.; Jakůbek J.; Kroupa M.; Tichy V. NIM A, Vol. 607, Issue 1, p. 202-204 2009
Pixel 2008 - Invited talk Semiconductor Pixel Detectors and their Applications in Life Sciences Jakůbek J. 2009 JINST 4 P03013 doi:10.1088/1748-0221/4/03/P03013 2009
X-Ray Fluorescence Imaging with Pixel Detectors Tichy V.; Holý T.; Jakůbek J.; Linhart V.; Pospíšil S.; Vykydal Z. Nucl. Instr. and Meth. A, Volume: 591, Issue:1, Pages: 67-70, doi: 10.1016/j.nima.2008.03.122 2008
10th Anniversary of IEAP