{ "muon": { "Z": 1, "A": 0.1134289259, "rho": 0, "Elast": 0, "ICRU": [], "IAEA": [] }, "Li-8": { "Z": 3, "A": 8.02248624, "rho": 0, "Elast": 0, "ICRU": [], "IAEA": [] }, "B-12": { "Z": 5, "A": 12.0143526, "rho": 0, "Elast": 0, "ICRU": [], "IAEA": [] }, "Mg-31": { "Z": 12, "A": 30.996648, "rho": 0, "Elast": 0, "ICRU": [], "IAEA": [] } }