硒的同位素74Ge Long-lived fission product Believed to decay by β−β− to 80Kr Primordial radionuclide Azzolini, O.; Beeman, J. W.; Bellini, F.; Beretta, M.; Biassoni
鉬的同位素Used to produce the medically useful radioisotope technetium-99m Primordial radionuclide Kajan, I.; Heinitz, S.; Kossert, K.; Sprung, P.; Dressler, R.;