Facts:   - residence: mumbai , india    - prizes: padma -rrb- bhushan -lrb- 1975 -rrb- bhatnagar award -lrb- 1971    - known for: nuclear neutron scattering cold fission program of india operation smiling buddha operation shakti    - fields: nuclear physics    - death date: 21 december 2011    - doctoral advisor: bertram neville brockhouse      - work institution: department research centre atomic energy commission of india government college university of july 2013 atomic energy -lrb- dae -rrb- bhabha atomic    - birth date: 29 june 1931    - name: p. k. iyengar    - nationality: indian    - death place: mumbai , india    - birth place: thiruvananthapuram , kerala   Based on these bullet points, write a short biography describing the life of p. k. iyengar .
The answer to this question is:
padmanabha krishnagopala iyengar -lrb- 29 june 1931 -- 21 december 2011 ; best known as p.k. iyenger -rrb- , was an indian nuclear physicist who is widely known for his central role playing in the development of the nuclear program of india .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 .