We bombarded aluminum with alpha rays … then after a certain period of irradiation, we removed the source of alpha rays. We now observed that the sheet of aluminum continued to emit positive electrons over a period of several minutes. — Frederic Joliot-Curie Copy Share Image
“It is because I know all that science can bring to the world that I shall continue my efforts to ensure that it contributes… — Frédéric Joliot-Curie Copy Share Image
Some months ago we discovered that certain light elements emit positrons under the action of alpha particles. Our latest experiments have shown a very striking fact: when an aluminium foil is irradiated on a polonium preparation [alpha ray emitter], the emission of positrons does not cease immediately when the active preparation is removed: the foil remains radioactive and the emission… — Frederic Joliot-Curie Copy Share
We bombarded aluminum with alpha rays … then after a certain period of irradiation, we removed the source of alpha rays. We now observed… — Frederic Joliot-Curie Copy Share Image
I have always attached great importance to the manner in which an experiment is set up and conducted ... the experiment should be set… — Frederic Joliot-Curie Copy Share Image
