Energy Spectrum of the Heavy Nuclei in the Cosmic Radiation between 7- and 100-Bev/Nucleon

The energy spectrum of the heavy nuclei of the cosmic radiation was determined between 7 Bev/nucleon and 100 Bev/nucleon. The distribution for the M(6≤Z≤9) and H(Z≥10) charge groups agree with one another within the limits of error. Combining both charge groups, the integral spectrum is of the form N(>E)~E^-1.6±0.15 (E=totalenergy/nucleon). Flux values for nuclei of the M, H, and VH(Z≥20) charge groups at the geomagnetic equator are given. Comparing these results with flux values obtained at high latitudes, it is concluded that a power spectrum of the form E^-1.6 fits all three charge groups within the limits of error between 2.5 Bev/nucleon and 7 Bev/nucleon. From the observation of α-particle showers of very high energy we conclude that under certain assumptions the integral spectrum of α particles can be represented by N(>E)~Eⁿ with n=-1.58_-0.18+0.21 for energies {≤}1500 Bev/nucleon.