Hélène Langevin-Joliot (née Joliot-Curie; born 19 September 1927) is a French nuclear physicist. She was educated at the IN2P3 (English: Institute of Nuclear Physics and Particle Physics) at Orsay, a laboratory which was set up by her parents Irène Joliot-Curie and Frédéric Joliot-Curie. She is a member of the French government's advisory committee. Currently, she is a professor of nuclear physics at the Institute of Nuclear Physics at the University of Paris and a director of research at the CNRS. She is also known for her work in actively encouraging women to pursue careers in scientific fields.She is chairperson of the panel that awards the , a prize given to outstanding European researchers.She was president of the French Rationalist Union from 2004 to 2012.