"We have described the "bullets" of white light which are projected from radium. The speed and microscopic volume of the white rays of all of the transuranium elements acquire their maximum fluorescence and maximum speed of terrific compression as they withdraw into their inert gas niton, and from there on down the line to helium." [Atomic Suicide, page 262]
See Also
cathode ray
Cosmic Rays
gamma rays
Radioactivity
Rays
uranium rays
X-ray