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Perpetual Atomics, QSA Global produce Am fuel for nuclear space power
U.K.-based Perpetual Atomics and U.S.-based QSA Global claim to have achieved a major step forward in processing americium dioxide to fuel radioisotope power systems used in space missions. Using an industrially scalable process, the companies said they have turned americium into stable, large-scale ceramic pellets that can be directly integrated into sealed sources for radioisotope power systems, including radioisotope heater units (RHUs) and radioisotope thermoelectric generators (RTGs).
W. P. Poenitz
Nuclear Science and Engineering | Volume 57 | Number 4 | August 1975 | Pages 300-308
Technical Paper | doi.org/10.13182/NSE75-A15422
Articles are hosted by Taylor and Francis Online.
Absolute measurements of the capture cross section of197Au were carried out in the 400- to 3500-keV energy range. Ratios of the capture cross sections of 238U to 197Au were measured from 20 to 1200 keV. Values for σn,y(238U) were derived by utilizing evaluated and present data for σ n,γ(197Au). The time-of-flight technique and a large liquid scintillator were used for the detection of the prompt capture gamma rays, and the Grey Neutron Detector, the Black Neutron Detector, and a 6Li-glass detector were used for the measurement and monitoring of the neutron flux. The present results support previous measurements of the 238U capture cross section and resolve some existing discrepancies. The absolute values for the capture cross section of 197Au agree well with evaluated data and measurements reported relative to the 235U fission cross section.
