Observation of Superhigh Energy Muons with Large Zenith Angles in Mountain Emulsion Chambers

Fan Xiaoling; Su Shi; Wang Yi

Chinese Physics C> 1991, Vol. 15> Issue(S2) : 109-117

Observation of Superhigh Energy Muons with Large Zenith Angles in Mountain Emulsion Chambers

Fan Xiaoling ¹ ,
Su Shi ¹ ,
Wang Yi ²

1 Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing, China;
2 Department of Physics, Zhengzhou University, Zhengzhou, Henan, China

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Abstract：
After 215 blocks of K6, K7 and K8 lead emulsion chambers of the Mt. Kanbala experiment are carefully scanned, 111 muon events with zenith angle M (=tgθ) ≥ 2.5 are found. The energy of muon showers are determined by saddle-shape curves. The intensity of muons, the shower energy spectrum and the zenith angle distribution of muon showers on the altitude of 5500 m above sea level are obtained in the energy region E_μ ≥ 2 TeV. Meanwhile, the simulation calculation is made in order to study the behavior of muons inside the emulsion chamber. The results of the simulation are basically in agreement with the experiment.
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Fan Xiaoling, Su Shi and Wang Yi. Observation of Superhigh Energy Muons with Large Zenith Angles in Mountain Emulsion Chambers[J]. Chinese Physics C, 1991, 15(S2): 109-117.

Fan Xiaoling, Su Shi and Wang Yi. Observation of Superhigh Energy Muons with Large Zenith Angles in Mountain Emulsion Chambers[J]. Chinese Physics C, 1991, 15(S2): 109-117. shu

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Received: 1990-06-30

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Supported by the National Youth Scientific Research Foundation.

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Observation of Superhigh Energy Muons with Large Zenith Angles in Mountain Emulsion Chambers

1 Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing, China;
2 Department of Physics, Zhengzhou University, Zhengzhou, Henan, China

Received Date: 1990-06-30

Fund Project: Supported by the National Youth Scientific Research Foundation.

Abstract: After 215 blocks of K6, K7 and K8 lead emulsion chambers of the Mt. Kanbala experiment are carefully scanned, 111 muon events with zenith angle M (=tgθ) ≥ 2.5 are found. The energy of muon showers are determined by saddle-shape curves. The intensity of muons, the shower energy spectrum and the zenith angle distribution of muon showers on the altitude of 5500 m above sea level are obtained in the energy region E_μ ≥ 2 TeV. Meanwhile, the simulation calculation is made in order to study the behavior of muons inside the emulsion chamber. The results of the simulation are basically in agreement with the experiment.