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Monte Carlo simulations of prompt-gamma emission during carbon ion irradiation
Le Foulher F., Bajard M., Chevallier M., Dauvergne D., Freud N. et al
IEEE Transactions on Nuclear Science 57 (5) (2010) 2768-2772 - http://hal.in2p3.fr/in2p3-00480024
Physique/Physique/Physique Médicale
Informatique/Imagerie médicale
Informatique/Modélisation et simulation
Monte Carlo simulations of prompt-gamma emission during carbon ion irradiation
F. Le Foulher1, M. Bajard1, M. Chevallier1, D. Dauvergne1, N. Freud2, P. Henriquet1, S. Karkar3, J.M. Létang2, L. Lestand4, R. Plescak, C. Ray1, D. Schardt, E. Testa1, M. Testa1
1 :  IPNL - Institut de Physique Nucléaire de Lyon
CNRS : UMR5822 – IN2P3 – Université Claude Bernard - Lyon I (UCBL)
2 :  CNDRI - Controle Non Destructif par Rayonnements Ionisants
Institut National des Sciences Appliquées [INSA] - Lyon
Antoine de SAINT-EXUPERY 25, avenue Jean Capelle 69621 Villeurbanne
3 :  CPPM - Centre de Physique des Particules de Marseille
CNRS : UMR7346 – IN2P3 – Université de la Méditerranée - Aix-Marseille II
163, avenue de Luminy - Case 902 - 13288 Marseille cedex 09
4 :  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
CNRS : UMR6533 – IN2P3 – Université Blaise Pascal - Clermont-Ferrand II
Campus des Cézeaux 24, avenue des Landais BP 80026 63171 Aubière Cedex
Monte Carlo simulations based on the Geant4 toolkit (version 9.1) were performed to study the emission of secondary prompt-gamma rays produced by nuclear reactions during carbon ion-beam therapy. These simulations were performed along with an experimental program and instrumentation developments which aim at designing a prompt-gamma ray device for real-time control of hadrontherapy. The objective of the present study is twofold: firstly, to present the features of the prompt-gamma radiation in the case of carbon ion irradiation; secondly, to simulate the experimental setup and to compare measured and simulated counting rates corresponding to four different experiments. For each experiment, we found that simulations overestimate prompt-gamma ray detection yields by a factor of 12. Uncertainties in fragmentation cross sections and binary cascade model cannot explain such discrepancies. The so-called “photon evaporation” model is therefore questionable and its modification is currently in progress.

Articles dans des revues avec comité de lecture
IEEE Transactions on Nuclear Science (IEEE Trans. Nucl. Sci.)
Publisher Institute of Electrical and Electronics Engineers (IEEE)
ISSN 0018-9499 
57 (5)

accepted for publication in IEEE TNS
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