 Two years later, the Professional Group on Nuclear Science was formed.In 1954 the first issue of the Transactions on Nuclear Science appeared, increasing to four issues per year in 1956.In 1963 the American Institute of Electrical Engineers (AIEE) merged with the IRE to form the IEEE, and the AIEE Nucleonics Committee and the Committee on Nucleaonic and Radiation Instruments merged with the IRE Professional Group on Nuclear Science on October 29, 1963, to become the Nuclear Science Group of the IEEE.