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The spark of the Super: Teller–Ulam and the birth of the H-bomb—rivalry, credit, and legacy at 75 years
In early 1951, Los Alamos scientists Edward Teller and Stanislaw Ulam devised a breakthrough that would lead to the hydrogen bomb [1]. Their design gave the United States an initial advantage in the Cold War, though comparable progress was soon achieved independently in the Soviet Union and the United Kingdom.
Junhua Luo, Rong Liu, Li Jiang
Nuclear Science and Engineering | Volume 172 | Number 1 | September 2012 | Pages 122-126
Technical Note | doi.org/10.13182/NSE11-109
Articles are hosted by Taylor and Francis Online.
In this study, activation cross sections were measured for the 71Ga(n,)72m+gGa reaction at three different neutron energies from 13.5 to 14.8 MeV. The fast neutrons were produced via the 3H(d,n)4He reaction on the Pd-300 Neutron Generator. Natural high-purity Ga2O3 powder was used as target material. Induced gamma activities were measured by a high-resolution gamma-ray spectrometer with a high-purity germanium detector. The data for the 71Ga(n,)72m+gGa reaction cross sections are reported to be 1.93 ± 0.12, 1.50 ± 0.09, and 0.91 ± 0.05 mb at 13.5 ± 0.2, 14.1 ± 0.2, and 14.8 ± 0.2 MeV incident neutron energies, respectively. Results are discussed and compared with some corresponding values found in the literature.