Primary Energy Spectrum of Cosmic Ray at the

Luo Guangxuan; Tan Youheng; Zhang Chunsheng; Dong Yuju; Yuan Peng; Zhang Huimin; Wang Hui; Yuan Yukui; Li Jing

Chinese Physics C> 1995, Vol. 19> Issue(9) : 769-774

Primary Energy Spectrum of Cosmic Ray at the

Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing, 100039

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Abstract：
650 thousands of EAS events recorded by Huairou EAS Array have been analysed carefully. The Size spectrum and primary energy spectrum in the region from 10¹⁵ to 10¹⁶eV are obtained. The energy spectrum shows a clear and smooth "Knee" structure around 3×10¹⁵eV. Except the smooth steep feature of "Knee", it is consistent very well with Akeno spectrum. Under the assumption of so-called rigidity dependent cut model, by adjusting the breaking energy Ec of primary proton spectrum in the Monte Carlo simulation and comparing with the experimental spectrum, we found that the proper value of E_c is in the energy range from 160 to 240TeV.

References

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B.Peters,Nuovo Cimento（suppl.）,14（1959）43;ibid,22（1961）800.[2] M.Ichimura et al,Proc.23rd ICRC,2（1993）5.[3] Tan,Y.H.et al,Proc.21st ICRC,（1990）HE,7.3.[4] 罗光宣等，怀柔实验总结报告,1994.[5] 罗光宣等，“怀柔EAS阵列的Monte Carlo研究”,高能物理与核物理，待发表。[6] M.Nagano et al,J.Phys.G,10（1984）1295.[7] N.L.Grigorov et al.,Proc.12nd ICRC,2（1971）206.[8] 张春生“宇宙线超高能核作用事例特征及其有关现象的研究”,博士论文，中国科学院高能物理所，1990.

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Luo Guangxuan, Tan Youheng, Zhang Chunsheng, Dong Yuju, Yuan Peng, Zhang Huimin, Wang Hui, Yuan Yukui and Li Jing. Primary Energy Spectrum of Cosmic Ray at the[J]. Chinese Physics C, 1995, 19(9): 769-774.

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Received: 1900-01-01
Revised: 1900-01-01

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