| Uranium is also important as the primary material from which the synthetic transuranium elements have been prepared by transmutation reactions. |
| The waste will include transuranium elements, which have long half-life periods, the group said. |
| Two important factors provided the key to the discovery and identification of many of the earliest-known transuranium elements. |
| Among the commonly known alpha emitters are various isotopes of polonium, radium, thorium, uranium and all of the transuranium elements. |
| One particularly interesting suggestion is that transuranium nuclei may have been detected in the cosmic rays. |
| It is prepared artificially in particle accelerators by bombarding heavy transuranium elements, such as californium, with alpha particles. |
