Hadronic interactions and primary-cosmic-ray composition at energies around 10151016 eV derived from the analysis of high-energy gamma families

J. R. Ren*, A. X. Huo, S. L. Lu, S. Su, C. R. Wang, N. J. Chang, P. Y. Cao, J. Y. Li, B. T. Zou, S. Z. Wang, G. Z. Bai, Z. H. Liu, G. J. Li, Q. X. Geng, R. D. He, W. D. Zhou, M. Amenomori, H. Nanjo, N. Hotta, I. OhtaK. Mizutani, K. Kasahara, T. Yuda, T. Shirai, N. Tateyama, Shoji Torii, M. Shibata, H. Sugimoto, K. Taira

*この研究の対応する著者

研究成果: Article査読

61 被引用数 (Scopus)

抄録

Gross features of gamma families observed at Mt. Kanbala (5500 m above sea level) and Mt. Fuji (3750 m) are summarized in comparison with a Monte Carlo simulation based on a plausible assumption about hadronic interactions and primary composition. Our analysis shows that the assumption of approximate Feynman scaling in the fragmentation region and a heavy-enriched primary composition in the energy range over 1015 eV is wholly compatible with the experimental data. That is, there is no evidence of strong violation of Feynman scaling in the fragmentation region at least up to 1016 eV. As to the primary cosmic rays, our data infer a steepening of proton spectrum at energies around 1014 eV. The proton component in the primary cosmic rays is estimated to occupy 1520 % of the total flux at 1015 eV. Some other interesting implications on hadronic interactions are discussed with reference to the structures of gamma families.

本文言語English
ページ(範囲)1404-1416
ページ数13
ジャーナルPhysical Review D
38
5
DOI
出版ステータスPublished - 1988
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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