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Scintillation Signal in XEMIS2, a Liquid Xenon Compton Camera with 3γ Imaging Technique

Abstract : The XEMIS project (XEnon Medical Imaging System), which makes use of 3γ imaging technique and liquid xenon Compton camera, aims to make a precise 3D localization of a specific radioactive emitter and to reduce drastically (100 times less) the injected activity to the patient in cancer diagnosis. The 3γ imaging is characterized by the simultaneous detection of 3 γ-rays emitted by$^{44}$Sc which is a (β+, γ) emitter. The second prototype XEMIS2 is a liquid xenon cylindrical camera for small animal imaging. The active volume of XEMIS2 is surrounded by a set of VUV-sensitive Hamamatsu photomultipliers, for the scintillation signals detection. A pulse-shaping amplifier was tested in XEMIS1 for the readout of the scintillation signal of the PMT. The typical output pulse shows a relatively good performance of the pulse-shaping amplifier providing a possible solution for XEMIS2 scintillation DAQ. Meanwhile, the pulse-shaping amplifier and the constant fraction discriminator (CFD) have lay the foundation of the preliminary design of XEMIS2 scintillation signal detection chain.
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Submitted on : Thursday, November 25, 2021 - 3:46:58 PM
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Yuwei Zhu, M. Abaline, S. Acounis, N. Beaupère, J.L. Beney, et al.. Scintillation Signal in XEMIS2, a Liquid Xenon Compton Camera with 3γ Imaging Technique. 4th International conference on Technology and Instrumentation in Particle Physics, May 2017, Beijing, China. pp.159-163, ⟨10.1007/978-981-13-1316-5_30⟩. ⟨hal-01863099⟩



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