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10"1 10° 101 102 1 03 1 04 1 05 1 06 Energy [ GeV / Nucléon ]

Figure 5.20: Differential energy spectra of protons and helium as measured by the balloon-borne emulsion experiments JACEE 1 to JACEE 12 (Asakimori et al., 1997; also Cherry et a1., 1997a), RUNJOB 95 (Apanasenko et al., 1999a and 1999b; Shibata, 1999), and a number of other experiments, as listed below. Note that the differential intensity, j(E), is multiplied by E25.

ffl Zatsepin et al. (1993)

o Freier and Waddington (1968)

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