THE NEGATIVE-POSITIVE RATIO OF CHARGED COSMIC RAY HADRONS AT THE 3220 m ABOVE SEA-LEVEL

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XU CHUN-XIAN, HUO AN-XIANG, YUAN YN-KUI, GU YI-DONG, LI TI-PEI, SHEN PEI-RO, JIA GUEI-BIN, XIAO QIAN-YI, ZHANG CHENG-MO and CHEN DUAN-BAO. THE NEGATIVE-POSITIVE RATIO OF CHARGED COSMIC RAY HADRONS AT THE 3220 m ABOVE SEA-LEVEL[J]. Chinese Physics C, 1978, 2(5): 423-427.
XU CHUN-XIAN, HUO AN-XIANG, YUAN YN-KUI, GU YI-DONG, LI TI-PEI, SHEN PEI-RO, JIA GUEI-BIN, XIAO QIAN-YI, ZHANG CHENG-MO and CHEN DUAN-BAO. THE NEGATIVE-POSITIVE RATIO OF CHARGED COSMIC RAY HADRONS AT THE 3220 m ABOVE SEA-LEVEL[J]. Chinese Physics C, 1978, 2(5): 423-427. shu
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Received: 1978-05-03
Revised: 1900-01-01
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THE NEGATIVE-POSITIVE RATIO OF CHARGED COSMIC RAY HADRONS AT THE 3220 m ABOVE SEA-LEVEL

Abstract: Single tracks of unaccompanÏed charged hadrons, within a horigontal area of 0.23m2 have been measured with a magnetic spectrometer, a pre-selector of momentum in combination with a multiplate cloud chamber in a laboratory at 3220m above sea level. Taking various possible corrections into account, the negative-positive ratio of charged hadrons was obtained as N-/N+=0.53±0.05 in the momentum range of 10-20 GeV/c. If we considered N+ contained only P and π+, N-were π-and that Nπ+/Nπ-=1, we deduced the result Nπ-/Np=0.9±0.1. Taking the form of the π-integral spectrum as j(>p)=Kp-γ, it was estimated that γ(?)2.3 in the momentum range 5—20 GeV/c. In this paper the integral verticel flux intensity of all charged hadrons was also estimated roughly, the result is:jp+π(>12 GeV/c)=(7.4±0.7)×10-5/cm2·sг·s.

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