Cosmic Ray Composition in the “Knee”Region Deduced from the Lateral Distribution of Cerenkov Light Emitted in Extensive Air Showers
ZHA Min1, CHUENG Tsang3, DING Lin-kai1, GAO Xiao-yu2, GENG Qing-xi2, LIU Chang-qin2, NG Pun-Hon4, YANG Hong-tao2, ZHU Qing-qi1
1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
2Institute of Cosmic Rays, Yunnan University, Kunming 650092
3Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
4Department of Science and Mathematics, Hong Kong Institute of Education, Hong Kong
Cosmic Ray Composition in the “Knee”Region Deduced from the Lateral Distribution of Cerenkov Light Emitted in Extensive Air Showers
1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
2Institute of Cosmic Rays, Yunnan University, Kunming 650092
3Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
4Department of Science and Mathematics, Hong Kong Institute of Education, Hong Kong
Abstract： We report the first result of measurements of the lateral distribution of Cerenkov light associated with cosmic ray extensive air showers with size between 105.0 and 106.6 observed in the Liangwang Mountain Observatory, 90 km east of Kunming City in China. The change trend towards heavy nucleus dominance of the primary cosmic ray composition in the “Knee”region is deduced with the aid of a Monte Carlo simulation.
(Cosmic rays (including sources, origin, acceleration, and interactions))
引用本文:
ZHA Min;CHUENG Tsang;DING Lin-kai;GAO Xiao-yu;GENG Qing-xi;LIU Chang-qin;NG Pun-Hon;YANG Hong-tao;ZHU Qing-qi. Cosmic Ray Composition in the “Knee”Region Deduced from the Lateral Distribution of Cerenkov Light Emitted in Extensive Air Showers[J]. 中国物理快报, 1999, 16(8): 622-624.
ZHA Min, CHUENG Tsang, DING Lin-kai, GAO Xiao-yu, GENG Qing-xi, LIU Chang-qin, NG Pun-Hon, YANG Hong-tao, ZHU Qing-qi. Cosmic Ray Composition in the “Knee”Region Deduced from the Lateral Distribution of Cerenkov Light Emitted in Extensive Air Showers. Chin. Phys. Lett., 1999, 16(8): 622-624.
1999, Vol. 16 
