Production Cross Sections of Fragments from Beams of 400â650 MeV per Nucleon â¹Be, ¹¹B, ¹²C, ¹â´N, ¹âµN, ¹â¶O, ²°Ne, ²²Ne, âµâ¶Fe, and âµâ¸Ni Nuclei Interacting in a Liquid Hydrogen Target. II. Isotopic Cross Sections of Fragments