How the nuclear weapons era began

How the nuclear weapons era began The atomic bomb was first tested on July 16, 1945 The U.S. effort to build atomic weapons was codenamed "The Manhattan Project" Mk I «Little Boy» Fat Man BBWidth, m Length, m Width, m 0.7 1.5 Length, m 3.0 3.2 Under the project, two atomic bombs – uranium and plutonium – were developed in parallel Charge 15-16 kilotons, uranium Charge 21 kilotons, plutonium Plutonium atomic bomb, Fat Man Tested on July 16, 1945 The core of the Fat Man plutonium bomb was tested on a special device called Gadget COLORADO Pusher/neutron absorber uranium casing/neutron - radius 23 cm Explosive envelope – radius 65 cm reflector – radius 11.5 cm \USA NEW MEXICO ARIZONA I D Alamogordo Desert TEXAS White Sands missile range in the Alamogordo Desert, New plutonium core - radius 4.5 cm Beryllium-polonium neutron initiator - Mexico radius 1 cm Explosion was accompanied by a flash seen at a distance of 300 km The uranium bomb, Little Boy, was ready for use !) after the first nuclear device Gadget (a prototype for the plutonium bomb Fat Man) was tested. It was Little Boy that was dropped on Hiroshima on August 6, 1945. Fat Man was the second bomb, which was dropped on Nagasaki Atomic mushroom cloud rose to a height of over 10 km Explosion crater had a diameter of almost 250 m Explosion yield was 20 to 22 kilotons Nuclear weapons tests 362 344 (official sources) 277 274 265 228 174 1,054 63 44 715 77 o 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 210 45 45 6. 6. 2 North U.S.A. Russia France United Kingdom China India Pakistan Korea RIANOVOSTI © 2010 www.rian.ru