AN EXPERIMENTAL STUDY OF EXTENSIVE AIR SHOWERS AND THE RELATION TO PRIMARY COSMIC RADIATION
An investigation of extensive air showers was performed at Mt. Norikura (2840 m above sea level. The air shower structure near the shower axis was studied in relation to the shower size. In this experiment, it is made clear how the core structure of the air shower depends upon the size of shower. Two interpretations are introduced; one is that the character of high-energy nuclear interaction varies with the energies, and the other is that primary energy spectrum of cosmic radiation decompass more sharply as the energy increases than can be expected from many experimental results so far obtained. From an analysis of the absorption length, it is plausible to consider that the primary energy spectrum has an upper limlt of 10/sup 17/ to 10/sup 18/ ev Some features for the origin of the cosmic radiation and for the shower curves of extensive air showers may he deduced. The change in the character of the nuclear interaction with the increase nf energy is not unreasonable. The shower curve of the air shower has not been investigated in detail, but it seems that the curve shows a maximum at about 400 to 500 g/cm/sup 2/, and a ratio between the size at 1000 g/cm/sup 2/ and at maximum is about several tens. Energy spectrum of the primary cosmic rudiation decreases more sharply than that so far obtained, and the effective upper limit is about 10/sup 17/ ev. If this speculation is correct, the origin of the cosmic variation is located in the inner space of the galaxy. (auth)
- Research Organization:
- Osaka City Univ.
- NSA Number:
- NSA-13-006925
- OSTI ID:
- 4265416
- Report Number(s):
- A/CONF.15/P/1967
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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