From 1912 to 1914, Irène re-entered a more orthodox mastering natural environment at the Collège Sévigné in central Paris from 1912 to 1914 and then onto the Faculty of Science at the Sorbonne. Irène studies at the Faculty of Science ended up interrupted by World War I. After the war, Irène returned to Paris to study at the Radium Institute, which had been built by her parents. Professorship at the Faculty of Science.