When this beam struck a target of erbium deuteride, the team detected neutrons coming from the target with precisely the energy expected if they were generated by the nuclear fusion of two deuterium nuclei.

BBC: NEWS | Science/Nature | Table-top fusion 'demonstrated'

Since the late 1950s, U.K. scientists have been attempting to achieve the fusion of hydrogen nuclei (tritum and deuterium) using magnetic confinement (MCF).

FORBES: U.K. And U.S. Join Forces on Laser-Fusion Energy

Dr Seaborg created plutonium for the first time in 1940, using the cyclotron to shoot deuterium ions into uranium atoms so fast that their nuclei merged.

ECONOMIST: Glenn Seaborg