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Dayton Project

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Dayton Project, Unit III, buildings 4 6
Dayton Project, Unit III, buildings 4 6

The Dayton Project was a research and development project to produce polonium during World War II, as part of the larger Manhattan Project to build the first atomic bombs. Work took place at several sites in and around Dayton, Ohio. Those working on the project were ultimately responsible for creating the polonium-based modulated neutron initiators which were used to begin the chain reactions in the atomic bombs. The Dayton Project began in 1943 when Monsanto's Charles Allen Thomas was recruited by the Manhattan Project to coordinate the plutonium purification and production work being carried out at various sites. Scientists at the Los Alamos Laboratory calculated that a plutonium bomb would require a neutron initiator. The best-known neutron sources used radioactive polonium and beryllium, so Thomas undertook to produce polonium at Monsanto's laboratories in Dayton. While most Manhattan Project activity took place at remote locations, the Dayton Project was located in a populated, urban area. It ran from 1943 to 1949, when the Mound Laboratories were completed in nearby Miamisburg, Ohio, and the work moved there. The Dayton Project developed techniques for extracting polonium from the lead dioxide ore in which it occurs naturally, and from bismuth targets that had been bombarded by neutrons in a nuclear reactor. Ultimately, polonium-based neutron initiators were used in both the gun-type Little Boy and the implosion-type Fat Man used in the atomic bombings of Hiroshima and Nagasaki respectively. The fact that polonium was used as an initiator was classified until the 1960s, but George Koval, a technician with the Manhattan Project's Special Engineer Detachment, penetrated the Dayton Project as a spy for the Soviet Union.

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Dayton Project
Runnymede Road,

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Wikipedia: Dayton ProjectContinue reading on Wikipedia

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Latitude Longitude
N 39.724722222222 ° E -84.179444444444 °
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Runnymede Road 799
45419
Ohio, United States
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Dayton Project, Unit III, buildings 4 6
Dayton Project, Unit III, buildings 4 6
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Hawthorn Hill
Hawthorn Hill

Hawthorn Hill is the house that served as the post-1914 home of Orville, Milton and Katharine Wright. Located in Oakwood, Ohio, Wilbur and Orville Wright intended for it to be their joint home, but Wilbur died in 1912, before the home's 1914 completion. The brothers hired the prominent Dayton architectural firm of Schenck and Williams to realize their plans. Orville and his father Milton and sister Katharine occupied the home in 1914. Though the property now comprises three acres (1.2 ha), the mansion originally sat on 17 acres (69,000 m2). The Wrights named the property after the hawthorn trees found on the property. There are at least 150 hawthorn trees on the site. Orville Wright designed some of the mechanical features of the house such as the water storage tank used to collect and recycle rainwater, and the central vacuum system; these features reflect his creative genius. For 34 years, this house was the gathering place for the greats and near-greats in the history of American aviation. The home was owned by the NCR Corporation after Orville's death until August 18, 2006, when the company donated the historic home to the Wright Family Foundation in honor of Orville's 135th birthday and National Aviation Day. NCR used it as a guesthouse for corporate VIPs and for corporate functions. On occasion they opened the home to the general public. In September 2007, Dayton History, in cooperation with the Wright Family Foundation, began offering scheduled public tours of Hawthorn Hill. NCR extensively redecorated the mansion's interior after Orville's death. Only Orville's study approximates its pre-1948 appearance. However, Edward A. Deeds, then-chairman of the National Cash Register Company, sent a photographer to the home immediately following Orville's death to visually record the interior of the house at that time. The U.S. Secretary of the Interior designated Hawthorn Hill a National Historic Landmark in 1991 and added it to the U.S. World Heritage Tentative List in January 2008 as a part of the Dayton Aviation Sites listing. It is a component of the National Aviation Heritage Area.