Measurements and calculations of gamma rays from proton-irradiated thick targets |
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| Institution: | 1. Advanced Research Institute for Science and Engineering, Waseda University, 555-3013-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan;2. Sattama Prefectual University, 820 Sannom ya, Koshigaya, Saitama 343-8540, Japan;3. Rissho University, 4-2-16 Osaki, Shinagawa, Tokyo 141-8602, Japan;4. Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;5. Moscow State Engineering Physics Institute, Kashirskoe Shosse 31, Moscow, Russia;1. School of Computer Science, The University of Auckland, Auckland, New Zealand;2. Institute of Mathematics and Computer Science, University of Greifswald, Greifswald, Germany;3. Department of Mathematics and Mathematical Biosciences Institute, The Ohio State University, Columbus OH, USA;1. Instituto Multidisciplinario de Investigaciones en Patologías Pediátricas (IMIPP, CONICET-GCBA), Servicio de Parasitología-Chagas, Hospital de Niños “Dr. Ricardo Gutiérrez”, Buenos Aires, Argentina;2. Instituto de Investigação Biomédica, Universidade de Coimbra, Coimbra, Portugal;3. Laboratorio de Biología Experimental, Centro de Estudios Metabólicos, Santander, Spain;4. Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina;5. Instituto de Investigaciones Biomédicas en Retrovirus y SIDA, CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina |
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| Abstract: | To help understand planetary gamma-ray spectra, the energies and intensities of gamma rays produced by energetic particles interacting in thick targets were simulated experimentally and numerically. Using the accelerator at RIKEN, thick targets of iron, granite, and gabbro were exposed to 180 or 210 MeV proton beam, and characteristic gamma rays emitted from the targets were measured by Ge detectors. The experimental results were compared with the values calculated by Geant4. The relative intensities of gamma-ray lines from the iron target in the experiment were consistent with those in the calculation within the error of ∼5%. As for stone targets, strong inconsistencies were observed. Further improvement in the calculation code and cross section files, as well as experimental resemblance to space missions are indispensable for gamma-ray spectroscopy. |
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