Design of detector to monitor the Bragg peak location of carbon ions by means of prompt γ-ray measurements with Geant4

doi:10.1007/s41365-018-0388-y

Abstract

Abstract:

Real-time monitoring of the Bragg peak location of carbon ions is urgently required for the quality control of hadron therapy. In this study, we design an annular detector to monitor the Bragg peak location of carbon ions with Geant4 simulation. This 360 surrounding structure has a high detection efficiency for the small-dose situation. The detector consists of a multilayered collimator system and an NaI scintillator for prompt gamma counting. The multilayered collimator includes a lead layer to prevent unwanted gammas and the paraffin and boron carbide layers to moderate and capture fast neutrons. An inclination of the detector further diminishes the background signal caused by neutrons. The detector, with optimized parameters, is applicable to carbon ions of different energies. In addition, the scintillator is replaced by an improved EJ301 organic liquid scintillator to discriminate gammas and neutrons. Inserting thin Fe slices into the liquid scintillator improves the energy deposition efficiency. The Bragg peak location of 200 MeV/u carbon ions can be monitored by prompt gamma detection with the improved liquid scintillator.

Key words: Bragg peak, Carbon ion, Prompt c-ray, Geant4

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[3]	Ran Xiao, Elvezio Morenzoni, Zaher Salman, Bang-Jiao Ye, Thomas Prokscha. A segmented conical electric lens for optimization of the beam spot of the low-energy muon facility at PSI: a Geant4 simulation analysis [J]. Nuclear Science and Techniques, 2017, 28(3): 29-29.
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[6]	E. E. Ermis, F. B. Pilicer, E. Pilicer, C. Celiktas. A comprehensive study for mass attenuation coefficients of different parts of the human body through Monte Carlo methods [J]. Nuclear Science and Techniques, 2016, 27(3): 54-54.
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[9]	ZHANG Suyalatu, CHEN Zhi-Qiang, HAN Rui, Roy Wada, LIU Xing-Quan, LIN Wei-Ping, LIU Jian-Li, SHI Fu-Dong, REN Pei-Pei, TIAN Guo-Yu, and LUO Fei . Neutron time-of-flight spectrometer based on HIRFL for studies of spallation reactions related to ADS project [J]. Nuclear Science and Techniques, 2015, 26(3): 30502-030502.
[10]	YU Guo-Liang, DONG Lian-Jie, LONG Hou, LU Han-Lin, TANG Hong-Qin . A novel 4π Gd-loaded liquid scintillator detection system [J]. Nuclear Science and Techniques, 2014, 25(5): 50401-050401.
[11]	LI Lei, TUO Xian-Guo, LIU Ming-Zhe, WANG Jun . High-resolution boosted reconstruction of γ-ray spectra [J]. Nuclear Science and Techniques, 2014, 25(5): 50202-050202.
[12]	JIANG Xiaofei, CHEN Chao, CAO Jing, CAO Hongrui. Simulation and calibration of the response function of multi-sphere neutron spectrometer [J]. Nuclear Science and Techniques, 2013, 24(6): 60406-060406.
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Nuclear Science and Techniques

Design of detector to monitor the Bragg peak location of carbon ions by means of prompt γ-ray measurements with Geant4

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