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Proving DRACO will deliver
The United States is now closer than it has been in over five decades to launching the first nuclear thermal rocket into space, thanks to DRACO—the Demonstration Rocket for Agile Cislunar Orbit.
Lu Han-Lin, Zhao Wen Rong, and Fan Pei Guo
Nuclear Science and Engineering | Volume 90 | Number 3 | July 1985 | Pages 304-310
Technical Paper | doi.org/10.13182/NSE85-3
Articles are hosted by Taylor and Francis Online.
The cross sections of the (n, 2n) reaction of 169Tm and of 181Ta at 14.61 ± 0.31 MeV were determined relative to the known neutron cross section of the 27Al(n, α)24Na reaction. The resulting values are 2014 ± 93 and 1269 ± 46 mb, respectively, when the Ryves et al. decay scheme is followed for the latter. The cross section of the (n, 3n) reaction of 169Tm was determined at 18.21 ± 0.24 MeV, relative to the 169Tm(n, 2n) cross section, to be 618 ± 25 mb. The shapes of the excitation curves for these three reactions were measured in the 12.3- to 18.3-MeV range. The (n, 2n) reactions were normalized at 14.61 MeV; the (n, 3n) reaction, at 18.21 MeV.