About Paul Ulrich Villard
Paul Ulrich Villard was a French chemist and physicist. He discovered gamma rays in 1900 while studying the radiation emanating from radium. At the time when he discovered what we now call gamma rays, Villard was working in the chemistry department of the École Normale Supérieure rue d'Ulm, Paris. Villard was a modest man and he did not suggest a specific name for the type of radiation he had discovered. In 1908, Villard pioneered the use of an ionization chamber for the dosimetry of ionizing radiation.
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