• [1]

    J. Pine et al., Nuovo cimento, Vol. 14 (1999), 1181.[2] P. J. Hayman, Proc. Phys. Soc., Vol. 80(1962), 710.[3] B. J. Bateman et al., Phys. letters, 30B (1971), N2.[4] R. C. Appleton et al., Nucl. Phys., 26B (1971), 365.[5] B. C. Nandi et al., Nucl. Phys., 40B (1972), 289.[6] 0. C. Allkofer et al., Phys. letters, 36B (1971), 425.[7] C. A. Ayre et al., I. Phys. G., Vol. 1(!975), 854.[8] Y. Muraki et al., Phys. Rev. Lett., 43(1979), 971.[9] L. K. Ng et al., Nuovo Cimento, 22B (1974).[10] S. Iida, Nuovo Cinzento, 26B (1977), 559.[11] 0. C. Allkofer et al., Phys. Rev. Lett., 41(1978), 823.[12] 0. C. Allkofer et al., Habil. Scfr. Kiel, (1964).[13] N. M. Kocharian et al.,J. Exp Theo Phys. (USSR), 30 (1956), 243.[14] 荆贵茹等, 高能物理与核物理, 5(1978)417.[15] O. C. Allkofer et al., Phys. Lett., 31B (1970 ) ; 606.[16] 李鹤年等, 宇宙线室年报, (1981-1982)40,[17] 李鹤年等, 高能物理与核物理, 9(1985),268,[18] 袁余奎等, 宇宙线室年报, (1980)16.[19] 李延国等, 宇宙线室年报,(1981-1982)44.[20] 丁林恺等, 高能物理与核物理, 6(1980)365.