Thin Man (nuclear bomb) Thin Man (nuclear bomb) "Thin Man" was the code name for a proposed plutonium gun-type nuclear bomb using plutonium-239 which the United States was developing during the Manhattan Project. They aborted its development when they discovered that the spontaneous fission rate of their nuclear reactor-bred plutonium was too high for use in a gun-type design, due to the high concentration of the isotope plutonium-240. In 1942, prior to the Army taking over wartime atomic research, Robert Oppenheimer held conferences in Chicago in June and Berkeley, California, in July at which various engineers and physicists discussed nuclear bomb design issues. A
Munir Ahmad Khan Munir Ahmad Khan Munir Ahmad Khan (; b. 20 May 1926 – 22 April 1999; ), was a Pakistani nuclear engineer and a nuclear physicist, who served as the chairman of the Pakistan Atomic Energy Commission (PAEC) from 1972 to 1991. He is credited among the persons who are called as "father of the Pakistan's atomic bomb project", for their role in Pakistan's integrated atomic bomb project— the clandestine Cold war program. Khan was technical director of the programme to develop nuclear weapons, which led to the Chagai-I nuclear testing in May 1998 in Balochistan. A technical adviser to the