Title
Gamma induced atom displacements in LYSO and LuYAP crystals as used in medical imaging applications Gamma induced atom displacements in LYSO and LuYAP crystals as used in medical imaging applications
Author
Faculty/Department
Faculty of Sciences. Chemistry
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Engineering sciences. Technology
Source (journal)
INTERACTIONS WITH MATERIALS AND ATOMS
Nuclear instruments and methods in physics research: B: beam interactions with materials and atoms. - Amsterdam
Volume/pages
356(2015) , p. 46-52
ISSN
0168-583X
ISI
000356990400008
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The radiation damage, in terms of atom displacements, induced by gamma irradiation in LYSO and LuYAP crystals is presented. Sc-44, Na-22 and V-48 are used as gamma sources for this study. The energy of gammas from the electron positron annihilation processes (511 keV) is also included in the study. The atom displacements distributions inside each material are calculated following the Monte Carlo assisted Classical Method introduced by the authors. This procedure also allows to study the atom displacements in-depth distributions inside each crystal. The atom displacements damage in LYSO crystals is found to be higher than in LuYAP crystals, mainly provoked by the displacements of silicon and oxygen atoms. But the difference between atom displacements produced in LYSO and LuYAP decreases when more energetic sources are used. On the other hand, the correlation between the atom displacements and energy deposition in-depth distributions is excellent. The atom displacements to energy deposition ratio is found to increases with more energetic photon sources. LYSO crystals are then more liable to the atom displacements damage than LuYAP crystals. (C) 2015 Elsevier B.V. All rights reserved.
E-info
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https://repository.uantwerpen.be/docman/iruaauth/d05d8b/127012.pdf
Handle