【摘要】 在海拔3220米高山上,利用大型磁谱仪测量了垂直方向动量区间（5—50）GeV/c的π^-介子和质子微分动量谱.二个谱可以分别表示为:j_π-（P）=9.6×10^-4P^-2.6（cm²·sr·s·GeV/c）^-1和jp（P）=1.26×10^-3P^2.5（cm²·sr·s·GeV/c）^-1;并得到该能区内二者的数目比N（π^-）/N（p）=0.62±0.14.更多还原

【Abstract】 Using a large magnetic spectrometer, the vertical differential spectra for pions and protons in the momentum range （5—50） GeV/c at 3220m above sea level were measured. The spectra of pions and protons can be given by j_π-（P）=9.6×10^-4P^-2.6 （cm²·sr·s·GeV/c）^-1 and j_P（P）=1.26×10^-3P^-2.5（cm²·sr·s·GeV/c）^-1 respectively. The flux ratio for pions to protons is 0.62±0.14.更多还原