If the conditions are right, they will combine, fuse and form darmstadtium plus neutron.
如果条件合适，它们将结合、聚变，形成鐽中子。
2
Heavy water is heavy because the hydrogen in it weighs twice as much as ordinary hydrogen (it has a proton and a neutron in its nucleus, instead of just a proton).
This work prepared the way for the discovery of the neutron by Sir James Chadwick and, above all, for the discovery in 1934 by Irène and Frédéric Joliot-Curie of artificial radioactivity.