Prog. Theor. Phys. Supplement No.32 (1964) pp. 1-71

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Observation of High Energy Jets with Emulsion Chambers

— Gamma-Rays on Mt. Norikura —

Makoto Akashi,¹ Zenjirô Watanabe,¹ Akeo Misaki,² Iwao Mito,² Yoshito Oyama,² Senzo Tokunaga,² Takeshi Ogata,³ Yoshikazu Tsuneoka,³ Shoji Dake,⁴ Kei Yokoi,⁴ Shunichi Hasegawa,⁵ Jun Nishimura,⁵ Kiyoshi Niu,⁵ Toshio Taira,⁵ Akio Nishio,⁶ Yōichi Fujimoto⁷ and Naofumi Ogita⁸

¹Department of Physics, Hirosaki University, Hirosaki
²Department of Physics, Konan University, Kobe
³Department of Physics, Kwansei Gakuin University, Nishinomiya
⁴Department of Physics, Nagoya University, Nagoya
⁵Institute for Nuclear Study, University of Tokyo, Tanashi, Tokyo
⁶School of Liberal Arts and Sciences, Kyoto University, Kyoto
⁷Science and Engineering Research Laboratory, Waseda University, Tokyo
⁸The Institute of Physical and Chemical Research, Komagome, Tokyo

Abstract:

Contents
1. Introduction
2. Design of the emulsion chamber
2.1 Early design of emulsion chamber
2.2 Emulsion chambers in the balloon experiment of 1955-56
2.3 Early emulsion chamber study at mountain altitudes, 1957-58
2.4 Emulsion chambers of the Mt. Norikura experiment, since 1958
3. Experimental procedure
3.1 Exposures
3.2 Processing of the nuclear emulsion plates and N-type films
3.3 Detection of the cascade showers
3.4 Energy determination of cascade showers
4. Energy spectrum of γ-rays
4.1 Experimental results of the spectrum
4.2 Necessary procedures for the spectrum measurement
4.3 Zenith angle distribution
4.4 Estimation of frequency of nuclear interactions
4.5 Effect of γ-ray families on the spectrum
5. Air cascades and their relation to the γ-ray spectrum
5.1 Production and diffusion of r-rays in the atmosphere
5.2 Direct γ-rays and cascade γ-rays
5.3 Analysis on air cascades
5.4 Spectrum in the highest energy regions
5.5 Summary of the spectrum measurements
6. Comparison with other experiments
6.1 Apparatus in other experiments on the γ-ray spectrum
6.2 Comparison of the results on the γ-ray spectrum
6.3 Spectrum of total radiated energy in nuclear interactions
6.4 Comparison with µ-meson intensity
7. Analysis of atmospheric interaction
7.1 Separation and identification of air cascades
7.2 Interpratation of γ-ray families
7.3 List of events
7.4 P_T distribution and energy distribution of π⁰-mesons and γ-rays
8. Conclusions and discussions
Appendix A. Fuji ET7A nuclear emulsion
Appendix B. Konishiroku N-type X-ray film

URL : http://ptp.ipap.jp/link?PTPS/32/1/
DOI : 10.1143/PTPS.32.1

References:

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Citing Article(s) :

Progress of Theoretical Physics Vol. 83 No. 1 (1990) pp. 58-76 :
Nuclear Interactions in Super High Energy Region

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