Energy spectra of prompt gamma rays from Al and Fe thick targets irradiated by helium and proton beams: Concerning planetary gamma-ray spectroscopy

Naoyuki Yamashita, Nobuyuki Hasebe, Takashi Miyachi, Mitsuhiro Miyajima, Kunitomo Sakurai, Masanori Kobayashi, Osamu Okudaira, Hiroyuki Yamamoto, Eido Shibamura, Yukio Uchihori, Masayuki Kase

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    3 Citations (Scopus)

    Abstract

    Bombardment experiments with thick targets made of each of Al and Fe were performed using 230 MeV/nucleon helium and 210MeV proton beams. The energies and intensities of prompt gamma rays emitted by inelastic nuclear scattering of energetic neutrons were measured by a high-purity Ge detector. This work presents the first experimental results concerning the emission of prompt gamma rays from thick targets anticipated by helium component in galactic cosmic rays, since no foregoing work related to this one has been done. It is concluded that helium has the capability of prompt gamma ray line emission through the inelastic nuclear reaction of neutrons with target material by a factor of 3.5 on average in comparison with proton. As regards the lunar and planetary nuclear spectroscopy, a consideration is given on the role of helium particles to the total production of gamma rays emitted from a planetary surface.

    Original languageEnglish
    Article number054201
    JournalJournal of the Physical Society of Japan
    Volume75
    Issue number5
    DOIs
    Publication statusPublished - 2006 May

    Keywords

    • Alpha particle
    • Gamma ray
    • Helium
    • Lunar and planetary nuclear spectroscopy
    • Proton
    • Thick target bombardment

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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    Yamashita, N., Hasebe, N., Miyachi, T., Miyajima, M., Sakurai, K., Kobayashi, M., Okudaira, O., Yamamoto, H., Shibamura, E., Uchihori, Y., & Kase, M. (2006). Energy spectra of prompt gamma rays from Al and Fe thick targets irradiated by helium and proton beams: Concerning planetary gamma-ray spectroscopy. Journal of the Physical Society of Japan, 75(5), [054201]. https://doi.org/10.1143/JPSJ.75.054201