The "Lise Meitner Medal and Prize" is a Silver Subject Award by the Institute of Physics (IOP). It is awarded every two years for distinguished contributions to physics public engagement, awarded in odd-numbered years. This medal comes with a prize of £1,000 and a certificate. Lise Meitner was an Austrian physicist who worked on radioactivity and nuclear physics. She was the first woman to become a full professor of physics in Germany. In 1944, the Nobel Prize in Chemistry was awarded to her long-time collaborator Otto Hahn for work on nuclear fission. In the 1990s, the records of the committee that decided on that prize were opened. Several scientists and journalists have called her exclusion “unjust”, and Meitner has received a flurry of posthumous honours, including the naming of chemical element 109 as meitnerium in 1997.