Measurements and calculations of gamma rays from proton-irradiated thick targets

Naoyuki Yamashita*, Nobuyuki Hasebe, T. Miyachi, E. Shibamura, H. Okada, O. Okudaira, H. Sori, T. Koike, T. Hiramoto, A. Nagashima, T. Fukuoka, M. Kase, V. Dmitrenko, K. Vlasik

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)


    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.

    Original languageEnglish
    Pages (from-to)2359-2362
    Number of pages4
    JournalAdvances in Space Research
    Issue number11
    Publication statusPublished - 2003

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics


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