Padmanabhan Krishnagopala Iyengar (29 June 1931 – 21 December 2011; best known as P. K. Iyengar), was an Indian nuclear physicist who is widely known for his central role in the development of the nuclear program of India. Iyengar previously served as the director of BARC and former chairman of the Atomic Energy Commission of India, he raised his voice and opposition against the nuclear agreement between India and the United States and expressed that the deal favoured the United States.
During his last years of his life, Iyenger engaged in peace activism and greatly exhorted the normalization of bilateral relations between India and Pakistan.
Career in Department of Atomic Energy
Iyengar joined the Tata Institute for Fundamental Research, Department of Atomic Energy in 1952 as a junior research scientist, undertaking a wide variety of research in neutron scattering. He later got shifted to Atomic Energy Establishment (later renamed as Bhabha Atomic Research Centre) when it