Quotes from Ernest Walton

Particles were coming out of the lithium, hitting the screen, and producing scintillations. They looked like stars suddenly appearing and disappearing.

As the size of cyclotrons increases and faster particles are produced, a difficulty arises due to the relativistic increase of mass of the particle.

The discovery that light elements could be disintegrated by artificially accelerated particles gave an additional impetus to development work on the various methods of producing them.