Frederic and Irene Joliot - Curie ( she is the daughter for M and Mme Curie , the distinguished discoverer of radium ) have been overwhelmed with the congratulations since it was made known that they had won the Nobel Prize for chemistry . Mme Curie and he husband have created new radioactive substance which do not exist in nature . They are shown here with their children , Helene and Pierre . 15 November 1935