Radioactivity from Carbon and Boron Oxide Bombarded with Deutons and the Conversion of Positrons into Radiation

In a note to Science we announced that we had observed radioactivity from certain light elements after they had been bombarded with deutons of 0.9 x 10^(6) e.v. energy, and, in particular, that we had been able to verify the prediction of Curie-Joliot and Joliot,(1) that carbon bombarded with deutons should yield the same radioactive end product as they obtained by bombarding boron with α-particles.