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“The Birth of a Little Boy: The Manhattan Project”

“The Birth of a Little Boy: The Manhattan Project”
In 1919 a New Zealand Nobel Peace Prize winning chemist working at Cambridge University in England would lay the foundation for one of the most prolific and destructive weapons the world has ever seen. Ernest Rutherford changed the way scientists looked at atomic structure when he successfully changed several atoms of nitrogen into oxygen. In this process he discovered the proton. Rutherford’s scientific discovery would get a boost in 1932 when his then colleague, James Chadwick, discovered the final piece to the atomic puzzle, the neutron. With the complete atomic structure established, the process of further breaking down elements began. One element of particular interest was uranium, the heaviest element on the periodic table. Uranium was broken down into three categories by their number of neutrons: uranium-234, uranium-235, and uranium-238.1 Six years later uranium-235 would become a focal point in nuclear research. The year 1938 would bring about the next phase of nuclear warfare, nuclear fission. Radiochemists, Otto Hahn and Fritz Strassman, were working in their lab in Berlin, bombarding different elements with neutrons. As they worked down the periodic table they stumbled on something interesting. Uranium reacted significantly more to neutron bombarding than the other elements they had tested. Additional testing led Hahn and Strassman to hypothesize that not only would the fission of uranium release vast amounts of energy; it would set in motion a chain reaction and create an explosion of immense proportions.2 Their discovery quickly made its way to America via Danish Physicist, Niels Bohr, who validated their findings while sailing to New York. Bohr Arrived in New York on January 16, 1939.3 Bohr, aided by American scientists, immediately began working on duplicating Hahn and Strassman’s work. Much needed and deeper research would require the help of the United States Government. At the urging of renowned scientist Albert Einstein, President Roosevelt was compelled to commission the research in uranium.4 On October 21, 1939 the Advisory Committee on Uranium would meet for the first time and research would push forward. Uranium-235 became the focus, however, uranium-235 was rare. So in order to produce more, an enriching process needed to be undertaken to turn uranium-238 into uranium-235.5 Uranium enrichment was extremely expensive and complicated, however, scientific demand deemed the quest worthy of limited funding.
As war waged on in Europe, America steadily worked away on enriching and researching uranium for use as a possible weapon.6 The United States was still quite some time away from having a functional bomb, but a tragic event on December 7, 1941 would catapult the Manhattan Project to a new level of urgency. Early that beautiful Hawaiian morning, life was abruptly interrupted with the terrifying sounds of piston driven aircraft, explosions, and air raid sirens. Panic had stricken the island of Oahu and the United States’ Pacific fleet at Pearl Harbor. After all was said and done, over 2,300 Americans had lost their lives and another 1,100 were wounded.7 Anger, fear, and want for retribution filled the hearts and minds of the American public. The next day President Roosevelt declared war on Japan. As America entered World War II, the urgency to create a working nuclear bomb was placed high on the docket. As 1942 passed, so did many changes to the Manhattan Project. In May 1942 renowned Physicist, Robert Oppenheimer joined the collective minds of the Manhattan Project. He would eventually head up the research at the Los Alamos plant in New Mexico and would earn the name “The Father of the Atomic Bomb”.8 In August 1942 the United States Army would become infused into the project.9 The man chosen to spearhead the project was the newly promoted Brigadier General Leslie Groves.10 With the military interlaced, the project would finally expand to great proportions. Funding was broadened and the acquisition of land in Tennessee was approved for the Oak Ridge site, the home of the Y-12 electromagnetic separation plant. An additional 400,000 acres were commissioned for the Hanford site in Washington, home of the X-10 plutonium site.11 The Manhattan Project was rapidly gaining speed and the nation was getting closer to having the weapon it would need to end the war. As construction ensued across the country, World War II was still claiming American casualties. As 1943 and 1944 ticked away, progress pushed on. The nuclear sites in Washington, New Mexico, and Tennessee were coming online. With progress underway on the bomb, a delivery vehicle was needed to place it over the target. The choice was an easy one and in June of 1943 the Boeing B-29 Superfortress earned the honors as the delivery vehicle for the nation’s most advanced weapon of mass destruction. The Manhattan Project, with overhauled B-29s, was ready to start airdrop testing of bomb models. In February 1944 airdrop testing commenced at Muroc Airfield in California, but in July 1944 the mission would have a set back. Oppenheimer rendered the gun-type plutonium-based weapon they had been developing at Los Alamos, code named Thin Man, as non functional. Full focus would have to shift to implosion style mechanisms for plutonium-based weapons. The new weapon’s code name was Fat Man. The gun-type mechanisms still worked for the uranium based weapon they code named Little Boy. Immediately, Fat Man replaced Thin Man and production was continued on Little Boy.12 On July 16, 1945 the Manhattan Project would finally thrust America into the Atomic Age with its first successful test of the atomic bomb.13 26 years after Rutherford discovered the proton and almost six years after Hahn and Strassman split the uranium atom, America had released the power of atomic fission. With authority, President Truman gave the order to release the new bomb on Japan.
August 6, 1945 a Boeing B-29 Superfortress named Enola Gay was carrying its precious cargo, a gun-type urnium-235 Little Boy bomb, to Hiroshima, Japan. At 0809 with clear skies, at altitude just above 31,000 feet, Colonel Paul Tibbets handed control over to bombardier, Major Thomas Ferebee. At 0815 Little Boy was released from the bomb bay falling onto Hiroshima below. Less than one minute later neutrons bombarded uranium protons causing them to split apart and release more energy than 16,000 tons of TNT. Days later Fat Man would be dropped on Nagasaki, Japan triggering the Japanese surrender, and scoring a victory for America and the Manhattan Project.14

Bibliography

“The Manhattan Project: Making the Atomic Bomb.” Atomicarchives.com. Accessed February 5, 2014. http://www.atomicarchive.com/History/mp/p1s1.shtml.

Roberts, Sam. “The Manhattan Project.” New York Times Upfront 145, no. 3 (October 8 2012) 18-21. Education Research Complete, EBSCOhost.

Richard Hewlett Oscar Anderson. The New World, 1939/1946, A History of the United States Atomic Energy Commission Volume I. University Park, Pennsylvania: Pennsylvania University Printing Press, 1962.

Jennifer Rosenburg. “Pearl Harbor Facts.” About.com 20th Century History. Accessed February 5, 2014. http://history1900s.about.com/od/Pearl-Harbor/a/Pearl-Harbor-Facts.htm.

Jennifer Rosenburg. “The Atomic Bombing of Hiroshima and Nagasaki.” About.com 20th Century History. Accessed February 5, 2014. http://history1900s.about.com/od/Pearl-Harbor/a/Pearl-Harbor-Facts.htm.

Lilian Hoddeson, Paul Henriksen, Roger Meade, Catherine Westfall. Critical Assembly: A Techinical History of Los Alamos During the Oppenheimer Years. New York, New York: Cambridge University Press, 1993.

Darrell Dvorak. “The First Atomic Bomb Mission: Trinity B029 Operations Three Weeks Before Hiroshima.” Air Power History 60, no. 4, Last modified 2013. Education Research Complete, EBSCOhost.

--------------------------------------------
[ 1 ]. 8 Lilian Hoddeson, Paul Henriksen, Roger Meade, Catherine Westfall, “Critical Assembly: A Technical History of Los Alamos During the Oppenheimer Years,” (New York, New York: Cambridge University Press, 1993).
9 “The Manhattan Project: Making the Atomic Bomb”, atomicarchives.com, accessed February 5, 2014, http://www.atomicarchive.com/History/mp/p1s1.shtml. p. 25.
10 Ibid, p. 27.
11 Ibid, p. 34-39.
[ 2 ]. 12 Darrell Dvorak, “The First Atomic Bomb Mission: Trinity B-29 Operations Three Weeks Before Hiroshima,” Air Power History 60, no. 4, last modified 2013. pp. 6-14.
13 Ibid, p. 4.
14 Jennifer Rosenburg, “The Atomic Bombing of Hiroshima and Nagasaki” About.com 20th Century History, accessed February 5, 2014, http://history1900s.about.com/od/Pearl-Harbor/a/Pearl-Harbor-Facts.htm.

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