On the energy dependence of the ratio of Li,Be and B to C,N, O and F nuclei in the primary cosmic rays

A critical study of all available data on the energy dependence of the ratio ff the intensities of Li, Be, and B to C, N, O and F nuclei (L/M-ratio) in cosmic rays is made. It seems that in a recent experiment by Von Rosenvingeet al. (1969), the flux of M-nuclei has come out higher in the energy interval of 200–400 MeV/nucleon and that of L-nuclei lower in the energy interval 400–600 MeV/nucleon; as a result they obtained a value of the ratio of L/M which is about 50% lower than all other investigators. The results of all other studies yield the best estimate of the ratio of L/M as 0.26±0.03, 0.41±0.03 and 0.26±0.02 in the energy interval 50–150, 200–600 and>1500 MeV/nucleon respectively.