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

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 proceeding › Conference 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 language	English
Title of host publication	Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007
Publisher	Universidad Nacional Autonoma de Mexico
Pages	647-650
Number of pages	4
Volume	1
Edition	SH
Publication status	Published - 2007
Event	30th International Cosmic Ray Conference, ICRC 2007 - Merida, Yucatan, Mexico Duration: 2007 Jul 3 → 2007 Jul 11

Other

Other	30th International Cosmic Ray Conference, ICRC 2007
Country	Mexico
City	Merida, Yucatan
Period	07/7/3 → 07/7/11

ASJC Scopus subject areas

Nuclear and High Energy Physics

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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 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 proceeding › Conference 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, 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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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.",

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

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T1 - Charge and mass composition of heavy ions in the earth's radiation belt

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

PY - 2007

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N2 - 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.

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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