Production ratios of ⁶Li/Be, B/Be, and ⁷Li/⁶Li from spallation and α‐α reactions according to Ramaty et al. (1996). The curves are labeled by the assumed composition of the cosmic rays (see text): SS = solar system, CRS = cosmic ray source composition, SN35 = predicted composition of ejecta of a Type II supernova of 35 M_☉, SN60 = predicted composition of ejecta of a Type supernova of 60 M_☉, WC = composition of a Wolf‐Rayet WC star, and GR = composition of interstellar grains. At the right are marked the observed abundance ratios ⁶Li/Be and B/Be of meteorites and the halo stars. The meteoritic and halo ⁷Li/⁶Li ratios are not marked because the dominant source of ⁷Li is not cosmic ray interactions.