Possibility of screen-type X-ray film for observation of heavy cosmic-ray primaries

Masakatsu Ichimura, Eiji Kamioka, Motoyasu Kitazawa, Keisuke Kirii, Tadashi Kobayashi, Toru Shibata, Masataka Kogawa, Shuichi Kuramata, Hideya Matsutani, Takayuki Murabayashi, Hirotada Nanjyo, Zenjiro Watanabe, Hisahiko Sugimoto, Kazuma Nakazawa

研究成果査読

8 被引用数 (Scopus)

抄録

This article discusses the possibility of screen-type X-ray film for the observation of heavy cosmic-ray primaries. We investigate in detail the optical characteristics of the intensifying screen Gd2O2S:Tb, and perform a simulation calculation for three-dimensional diffusion of scintillation light emitted from numerous δ-rays (knockon electrons produced by a heavy primary) in the screen. On the basis of these theoretical speculations, we report the experimental results obtained recently by a balloon-borne emulsion chamber with full use of the screen type X-ray film, focusing to the charge resolution of heavy primaries and their flux with energy larger than the rigidity cutoff at Sanriku latitude, Ec∼ 4 GeV/n. All results show that the emulsion chamber with multilayered screen-type X-ray film is quite valid and powerful for the observation of heavy cosmic-ray primaries.

本文言語English
ページ(範囲)374-394
ページ数21
ジャーナルNuclear Inst. and Methods in Physics Research, A
300
2
DOI
出版ステータスPublished - 1991 1 15
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 器械工学

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