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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. Hage, K. Wisshak, F. Käppeler
Nuclear Science and Engineering | Volume 78 | Number 3 | July 1981 | Pages 248-258
Technical Paper | doi.org/10.13182/NSE81-A20302
Articles are hosted by Taylor and Francis Online.
The neutron fission cross section of 241Am was measured in the energy range from 10 to 1030 keV using 235U as a standard. The measurements were carried out at the Karlsruhe 3-MV pulsed Van de Graaff accelerator with 7Li targets for the generation of a continuous neutron spectrum below 140 keV and monoenergetic neutron spectra between 120 and 1030 keV. Fission events were detected by measuring the prompt fission neutrons with an NE-213 liquid scintillator with pulse-shape discrimination. The flight path was as short as 60 mm in measurements with continuous neutron spectra leading to a moderate energy resolution. The statistical uncertainty was between 0.8 and 10% and the systematic uncertainty between 5.4 and 8.5%. Discrepancies were found when comparing our results with those of other experiments.