<page_title> Actinide </page_title> <section_title> Discovery, isolation and synthesis </section_title> <table> <cell> Berkelium <col_header> Element </col_header> </cell> <cell> 1949 <col_header> Year </col_header> </cell> <cell> Bombarding 241Am by α-particles <col_header> Method </col_header> </cell> <cell> Californium <col_header> Element </col_header> </cell> <cell> 1950 <col_header> Year </col_header> </cell> <cell> Bombarding 242Cm by α-particles <col_header> Method </col_header> </cell> </table>
Bombarding curium-242 with α-particles resulted in californium (1950), and a similar procedure yielded in 1949 berkelium from americium-241.