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Monitoring the Bragg peak location of 73 MeV/u carbon ions by means of prompt $\gamma$-ray measurements

Abstract : By means of a time-of-flight technique, we measured the longitudinal profile of prompt $\gamma$-rays emitted by 73 MeV/u $^{13}$C ions irradiating a PMMA target. This technique allowed us to minimize the shielding against neutrons and scattered $\gamma$-rays, and to correlate prompt gamma emission to the ion path. This correlation, together with a high counting rate, paves the way toward real-time monitoring of the longitudinal dose profile during ion therapy treatments. Moreover, the time correlation between the prompt gamma detection and the transverse position of the incident ions measured by a beam monitor can provide real-time 3D control of the irradiation.
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Submitted on : Monday, September 1, 2008 - 10:06:36 AM
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E. Testa, M. Bajard, M. Chevallier, D. Dauvergne, F. Le Foulher, et al.. Monitoring the Bragg peak location of 73 MeV/u carbon ions by means of prompt $\gamma$-ray measurements. Applied Physics Letters, American Institute of Physics, 2008, 93, pp.093506. ⟨10.1063/1.2975841⟩. ⟨in2p3-00315797⟩



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