Lateral Density Distribution of Charged Particles in the Central Region of Extensive Air Shower

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Abstract
The lateral density distribution of the ionizing particles around the core of the extensive air shower has been observed with ten plastic scintillation counters at mountain altitude (2775 meters above sea level). The lateral density distribution, which has seemed so far to be expressed by the unique function of the distance from the central axis of extensive air showers, has been clearized as that it could be expressed by 1/ r n approximately is a range of 20 meters from the axis and n varies from 0.8 to 2.0 by the character of each shower. The result seems to have a relation to the fluctuation which has been presented in the previous paper or to the fluctuation of nuclear cascade in the development of extensive air showers. The density spectrum at single counter has been also analysed and the result supports above conclusion.