On the photon self-absorption correction for thin-target-yields vs. thick-target-yields in radionuclide production

In the experimental determination of activity of low gamma energy emitters by HPGe spectrometry, after cyclotron irradiation of thick targets of high Z elements, it is mandatory to introduce a correction for gamma-ray self-absorption in the target. The amount of this correction is substantial in ord...

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Bibliographic Details
Published in:Applied radiation and isotopes 2009-02, Vol.67 (2), p.240-242
Main Authors: Alfassi, Zeev B., Persico, Elisa, Groppi, Flavia, Bonardi, Mauro L.
Format: Article
Language:English
Subjects:
Calibration
Cyclotrons
Gamma Rays
HpGe spectrometry
Radioisotopes - analysis
Radionuclide production
Self-absorption
Spectrometry, Gamma - standards
Thick target
Thin foils
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Summary:In the experimental determination of activity of low gamma energy emitters by HPGe spectrometry, after cyclotron irradiation of thick targets of high Z elements, it is mandatory to introduce a correction for gamma-ray self-absorption in the target. The amount of this correction is substantial in order to provide a statistically acceptable agreement with the thick-target-yield data obtained by integration of the experimental thin-target-yield data that are very slightly affected by self-absorption instead.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2008.10.004