ON ENERGY DEPENDENCE OF RATIO OF LI,BE AND B TO C, N, O AND F NUCLEI IN 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 Rosenvinge et 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. © 1969 D. Reidel Publishing Company.