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

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; CHEN DUAN-BAO

Chinese Physics C> 1978, Vol. 2> Issue(5) : 423-427

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

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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 N_π+/N_π-=1, we deduced the result N_π-/N_p=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:j_⊥^p+π（>12 GeV/c）=（7.4±0.7）×10^-5/cm²·sг·s^_.

References

[1]

R. W. Ellsworth et al., 14th Int. C. R. Conf., 7(1975), 2528.[2] R. W. Ellsworth et al., 14th Int. C. R. Conf., 7(1975), 2538.[3] F. Siohan et al., 13th Int, C. R. Conf., 3 (1973), 2135.[4] V. A. Sobinyakov et al., Cana. Jour, of Phys., 10-12 (1968), 686.[5] V. A. Avakian and M. P. Pheshko, Cana Jour of Phys., 10-12 (1968), 709.[6] 荆贵茹等，本期，417.[7] 原子能研究所云南站，物理, 2(1972), 57.[8] 袁余奎等，本期，478.[9] 李惕碚，《实验的数学处理》科学出版社(将出版).

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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.

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Received: 1978-05-03
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 1978-05-03
Accepted Date: 1900-01-01
Available Online: 1978-10-05

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 N_π+/N_π-=1, we deduced the result N_π-/N_p=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:j_⊥^p+π（>12 GeV/c）=（7.4±0.7）×10^-5/cm²·sг·s^_.