Irène Joliot-Curie and Frédéric Joliot identified induced radioactivity by following the Positrons emitted from irradiated light elements after the source was removed. Their 1934 paper reports continuing activity in aluminium, boron and magnesium, with different decay times. The falling count rate is a readout of unstable products left in the material, connecting controlled irradiation with the creation and measurement of radioactive isotopes.[ref]
Artificial Production of a New Kind of Radio-Element by Frédéric Joliot and Irène Joliot-Curie. 1934 abstract, irradiated aluminium, boron and magnesium and their continuing activity
A physicist.[ref]
https://www.nobelprize.org/prizes/chemistry/1935/joliot-curie/biographical/?print=1. Independent professional biography and identity
Portrait of Irène Joliot-Curie
. Studio Harcourt / Wellcome Collection, via Wikimedia Commons. Public domain in France and the United States according to the actual File page’s PD-France and PD-1996 licensing declarations; attribution retained. Source usage terms, via Wikimedia Commons. Source.
Irène Joliot-Curie was a French physicist and chemist, born on September 12, 1897, and she passed away on March 17, 1956. She was the daughter of famed scientists Marie Curie and Pierre Curie, and she continued her family's legacy in the field of radiation and radioactivity.
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