Uranium radiation quantified

Used piezoelectricity to measure the intensity of radiation given off by uranium compounds. She found that the intensity was proportional to the amount of uranium, suggesting that radiation comes directly from the uranium atom, not the compound.
 Marie Sklodowska Curie France 1897 Uranium radiation quantified

Used piezoelectricity to measure the intensity of radiation given off by uranium compounds. She found that the intensity was proportional to the amount of uranium, suggesting that radiation comes directly from the uranium atom, not the compound.