Charge and mass composition of heavy ions in the earth's radiation belt

Makoto Hareyama, Nobuyuki Hasebe, Satoshi Kodaira, Naoki Masuyama, Shuya Ota, Kunitomo Sakurai, Tateo Goka, Hideki Koshiishi, Haruhisa Matsumoto

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Energetic heavy ions with 20∼200 MeV/nucleon in the radiation belts have been observed by Heavy Ion Telescope (HIT) onboard TSUBASA satellite. The data observed during quiet periods in the outer region of radiation belt indicate that the relative abundance for major elements are similar to that of primary nuclei in galactic cosmic rays obtained by ACE/CRIS experiment, in particular for the ratio of 22Ne/20Ne, while the absolute intensities there were less than that obtained by ACE/CRIS. On the other hand, in the inner region of radiation belt near the earth, both energetic 3He and 4He isotopes were enhanced, in particular for 3He, however, no energetic heavy ions except for energetic nuclei as Li-B, N and Ar were observed. Thus the charge and mass composition of heavy ions is essential to our consideration of possible sources and behavior of energetic heavy ions trapped in the radiation belt.

    Original languageEnglish
    Title of host publicationProceedings of the 30th International Cosmic Ray Conference, ICRC 2007
    PublisherUniversidad Nacional Autonoma de Mexico
    Pages647-650
    Number of pages4
    Volume1
    EditionSH
    Publication statusPublished - 2007
    Event30th International Cosmic Ray Conference, ICRC 2007 - Merida, Yucatan, Mexico
    Duration: 2007 Jul 32007 Jul 11

    Other

    Other30th International Cosmic Ray Conference, ICRC 2007
    CountryMexico
    CityMerida, Yucatan
    Period07/7/307/7/11

    Fingerprint

    terrestrial radiation
    radiation belts
    heavy ions
    nuclei
    isotopes
    telescopes

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Hareyama, M., Hasebe, N., Kodaira, S., Masuyama, N., Ota, S., Sakurai, K., ... Matsumoto, H. (2007). Charge and mass composition of heavy ions in the earth's radiation belt. In Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007 (SH ed., Vol. 1, pp. 647-650). Universidad Nacional Autonoma de Mexico.

    Charge and mass composition of heavy ions in the earth's radiation belt. / Hareyama, Makoto; Hasebe, Nobuyuki; Kodaira, Satoshi; Masuyama, Naoki; Ota, Shuya; Sakurai, Kunitomo; Goka, Tateo; Koshiishi, Hideki; Matsumoto, Haruhisa.

    Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007. Vol. 1 SH. ed. Universidad Nacional Autonoma de Mexico, 2007. p. 647-650.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Hareyama, M, Hasebe, N, Kodaira, S, Masuyama, N, Ota, S, Sakurai, K, Goka, T, Koshiishi, H & Matsumoto, H 2007, Charge and mass composition of heavy ions in the earth's radiation belt. in Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007. SH edn, vol. 1, Universidad Nacional Autonoma de Mexico, pp. 647-650, 30th International Cosmic Ray Conference, ICRC 2007, Merida, Yucatan, Mexico, 07/7/3.
    Hareyama M, Hasebe N, Kodaira S, Masuyama N, Ota S, Sakurai K et al. Charge and mass composition of heavy ions in the earth's radiation belt. In Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007. SH ed. Vol. 1. Universidad Nacional Autonoma de Mexico. 2007. p. 647-650
    Hareyama, Makoto ; Hasebe, Nobuyuki ; Kodaira, Satoshi ; Masuyama, Naoki ; Ota, Shuya ; Sakurai, Kunitomo ; Goka, Tateo ; Koshiishi, Hideki ; Matsumoto, Haruhisa. / Charge and mass composition of heavy ions in the earth's radiation belt. Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007. Vol. 1 SH. ed. Universidad Nacional Autonoma de Mexico, 2007. pp. 647-650
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    AU - Hareyama, Makoto

    AU - Hasebe, Nobuyuki

    AU - Kodaira, Satoshi

    AU - Masuyama, Naoki

    AU - Ota, Shuya

    AU - Sakurai, Kunitomo

    AU - Goka, Tateo

    AU - Koshiishi, Hideki

    AU - Matsumoto, Haruhisa

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    AB - Energetic heavy ions with 20∼200 MeV/nucleon in the radiation belts have been observed by Heavy Ion Telescope (HIT) onboard TSUBASA satellite. The data observed during quiet periods in the outer region of radiation belt indicate that the relative abundance for major elements are similar to that of primary nuclei in galactic cosmic rays obtained by ACE/CRIS experiment, in particular for the ratio of 22Ne/20Ne, while the absolute intensities there were less than that obtained by ACE/CRIS. On the other hand, in the inner region of radiation belt near the earth, both energetic 3He and 4He isotopes were enhanced, in particular for 3He, however, no energetic heavy ions except for energetic nuclei as Li-B, N and Ar were observed. Thus the charge and mass composition of heavy ions is essential to our consideration of possible sources and behavior of energetic heavy ions trapped in the radiation belt.

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