EPJ Web Conf.
Volume 146, 2017ND 2016: International Conference on Nuclear Data for Science and Technology
|Number of page(s)||4|
|Published online||13 September 2017|
In-flight annihilation correction for 511 keV photon spectrometry
1 iThemba LABS, PO Box 722, Somerset West, 7129, South Africa
2 Cyclotron Application Department, ATOMKI, PO Box 51, 4001, Debrecen, Hungary
3 Paul Scherrer Institute, Villigen-PSI, Switzerland
a e-mail: firstname.lastname@example.org
Published online: 13 September 2017
Spectrometry based on the 511 keV annihilation photopeak requires the positron source to be surrounded by a suitable absorber material. While this method is well established in the literature, correction for in-flight annihilation losses from the 511 keV photopeak is often found to be neglected. Application to volume sources, such as typically employed in a radionuclide production environment for yield determination and quality control (QC) purposes, is presented. Source strengths obtained by analyzing the 511 keV photopeak are compared with values obtained from characteristic γ-lines for a selection of non-pure positron emitters. Better overall agreement is obtained when in-flight annihilation loss corrections are explicitly performed.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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