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Chinese Physics C> 1986, Vol. 10> Issue(6) : 641-646 

AN ANALYSIS OF PRIMARY COSMIC RAY COMPOSITION AT ENERGIES AROUND 1014eV USING SINGLE-SHOWER EVENTS OBSERVED BY MOUNTAIN EMULSION CHAMBER

  • The characteristics of electromagnetic and hadronic components in high energy cosmic rays at mountain altitude are studied by analysing single-shower events observed by mountain emulsion chamber. The chemical composition of primary cosmic rays in the energy region around 1014eV is studied by using Monte-Carlo simulation. The simulated power indices of energy spectra and attenuation lengths in air in agreement with the experimental data. The analysis of their vertical intensities indicates that the chemical composition of primary cosmic rays at energies around 1014eV is not contradicted to the simple extrapolation from lower energies and the abundance of protons can not be less than 30% and that of the nuclei with A≥2 not larger than 70%.
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    [1] 例如 A. M. Hillas, Proceedings of Cosmic Ray Workshop, University of Utah, 1983, P. 1.[2] Wang. C. R et al., 17 th ICRC, 5 (1981), 251.[3] 霍安祥等, 高能物理与核物理, 6 (1982), 778.[4] Ren. J. R et al., 18 th ICRC,5 (1983), 285.[5] 曹培园等, 第四届全国宇宙线会议论文(重庆建工学院学报, 1985年增刊, p.105).[6] 木钧等, 云南大学学报, 7 (1985), 289.[7] Ren. J. R et al., 19 th ICRC, 5(1985), 204.[8] 张春生等, 高能物理与核物理, 9 (1985), 649.[9] 例如,A. G. Ekspong, CERN-EP/84-43, (1984); J. G. Rushbrooke, CERN-EP/85-124, (1985) 及其有关引文.[10] 丁林惶等, 科学通报, (待发表).[11] 任敬儒等, 高能物理与核物理, 5 (1981), 205.[12] 和煌东等, 云南大学学报, (待发表).[13] L. W. Jones, 18 th ICRC, 5 (1983), 17.[14] T. K. Gaisser et al., 18 th ICRC, 5 (1983), 174.[15] 例如 M. A. Faessler, CERN-EP/84-64, (1984).[16] 丁林恺等, 高能物理与核物理, 7 (1983),129.[17] 经才骆等, 高能物理与核物理, 10 (1986), 636.

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HE Yu-Dong, ZHOU Wen-De, HE Ren-Dao, MU Jun, DING Lin-Kai, ZHU Qing-Qi, JING Cai-Liu and JING Gui-Ru. AN ANALYSIS OF PRIMARY COSMIC RAY COMPOSITION AT ENERGIES AROUND 1014eV USING SINGLE-SHOWER EVENTS OBSERVED BY MOUNTAIN EMULSION CHAMBER[J]. Chinese Physics C, 1986, 10(6): 641-646.
HE Yu-Dong, ZHOU Wen-De, HE Ren-Dao, MU Jun, DING Lin-Kai, ZHU Qing-Qi, JING Cai-Liu and JING Gui-Ru. AN ANALYSIS OF PRIMARY COSMIC RAY COMPOSITION AT ENERGIES AROUND 1014eV USING SINGLE-SHOWER EVENTS OBSERVED BY MOUNTAIN EMULSION CHAMBER[J]. Chinese Physics C, 1986, 10(6): 641-646. shu
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Received: 1900-01-01
Revised: 1900-01-01
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AN ANALYSIS OF PRIMARY COSMIC RAY COMPOSITION AT ENERGIES AROUND 1014eV USING SINGLE-SHOWER EVENTS OBSERVED BY MOUNTAIN EMULSION CHAMBER

    Corresponding author: HE Yu-Dong,
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 1986-12-05

Abstract: The characteristics of electromagnetic and hadronic components in high energy cosmic rays at mountain altitude are studied by analysing single-shower events observed by mountain emulsion chamber. The chemical composition of primary cosmic rays in the energy region around 1014eV is studied by using Monte-Carlo simulation. The simulated power indices of energy spectra and attenuation lengths in air in agreement with the experimental data. The analysis of their vertical intensities indicates that the chemical composition of primary cosmic rays at energies around 1014eV is not contradicted to the simple extrapolation from lower energies and the abundance of protons can not be less than 30% and that of the nuclei with A≥2 not larger than 70%.

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