They showed that this radiation consisted of particles carrying one unit positive charge with mass equal to that of an electron, now known as a positron.
[4] The conditions inside certain types of nuclear reactors with high neutron flux can induce radioactivity.
Further research originally done by Irene and Frederic Joliot-Curie has led to modern techniques to treat various types of cancers.
[5] After World War I, with support from Constantin Kirițescu, Ștefania Mărăcineanu obtained a fellowship that allowed her to travel to Paris to further her studies.
She received her Ph.D. At the institute, Mărăcineanu researched the half-life of polonium and devised methods of measuring alpha decay.This work led her to believe that radioactive isotopes could be formed from atoms as a result of exposure to polonium's alpha rays, an observation which would lead to the Joliot-Curies' 1935 Nobel Prize.