TORONTO, Nov. 13, 2020 – Precision matters. York University Distinguished Research Professor Eric Hessels, who has conducted the most precise measurement to date of the fine structure of helium and of the hydrogen n=2 Lamb shift to come closest to solving the proton-size puzzle, deals in precision every day. It is his work in the precision measurement field that has earned him the 2020 Canadian Association of Physicists (CAP) Medal for Lifetime Achievement in Physics.
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