Description:
 
Obverse
Harp at centre. éire to the left, 2015 on the right
Reverse
Walton and Cockcroft’s experiment. At the bottom of the design is an atom, an arrow points upwards to Lithium 7. An arrow points upwards to the left to an explosion. An “E” for energy streams upwards from the explosion. Einstein’s theory of special relativity “E=MC2“. On the left, two Helium (alpha) particles.
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