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The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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ANS Student Conference 2025
April 3–5, 2025
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General Kenneth Nichols and the Manhattan Project
Nichols
The Oak Ridger has published the latest in a series of articles about General Kenneth D. Nichols, the Manhattan Project, and the 1954 Atomic Energy Act. The series has been produced by Nichols’ grandniece Barbara Rogers Scollin and Oak Ridge (Tenn.) city historian David Ray Smith. Gen. Nichols (1907–2000) was the district engineer for the Manhattan Engineer District during the Manhattan Project.
As Smith and Scollin explain, Nichols “had supervision of the research and development connected with, and the design, construction, and operation of, all plants required to produce plutonium-239 and uranium-235, including the construction of the towns of Oak Ridge, Tennessee, and Richland, Washington. The responsibility of his position was massive as he oversaw a workforce of both military and civilian personnel of approximately 125,000; his Oak Ridge office became the center of the wartime atomic energy’s activities.”
Izumi Tsubone, Yutaka Nakajima, Yutaka Furuta, Yukinori Kanda
Nuclear Science and Engineering | Volume 88 | Number 4 | December 1984 | Pages 579-591
Technical Paper | doi.org/10.13182/NSE84-A18374
Articles are hosted by Taylor and Francis Online.
The neutron total cross sections of 181Ta and 238U have been obtained in the energy range from 24.3 keV to 1 MeV by means of neutron transmission measurements using the Japan Atomic Energy Research Institute Linac, The measurements were carried out with the iron-filtered neutron beam technique and the time-of-flight method, using an NE-110 plastic scintillator as a neutron detector at a 100-m station. For 238U, correction for the resonance self-shielding effect was taken into account below 270 keV by measuring the transmission of four samples of different thicknesses. By fitting average R matrix calculations to the observed total cross sections, the neutron strength functions Sℓ for p and d waves, and distant level parameters for s, p, and d waves were deduced to be: , and for 181Ta, and , and for 238U. The effective s-wave scattering radii were 7.90 ± 0.03 and 9.30 ± 0.04 fm for 181Ta and 238U, respectively.