For an explanation, see the main splats page
SPLATS about the nature of radioactivity
The principles of the nature of radioactivity
Needs more material
- In 1899, Ernest Rutherford discovered that uranium radiation is composed of positively charged alpha particles and negatively charged beta particles.
- In 1913, Niels Bohr identified radioactivity as a specific property of the nucleus of the atom, rather than being a general property of the atom as a whole.
- In 1917, Ernest Rutherford and Marsden described artificial transmutation of elements, after having produced hydrogen and oxygen from nitrogen.
- In 1929, John Cockcroft and Ernest Walton succeeded in 'atom-smashing' as it was called, using equipment based on four glass cylinders taken from petrol pumps.
- In 1932, John Cockcroft and Ernest Walton took linear proton accelerators to an energy of 700 keV and verified the mass/energy equivalence.
- Cockcroft and Walton used accelerated protons, hydrogen ions to split lithium and boron nuclei, and also to make unstable nuclei that were radioactive.
- In 1934, Irène Joliot-Curie and Frédéric Joliot-Curie bombarded aluminium atoms with alpha particles to create artificially radioactive phosphorus-30.
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