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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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ANS and the U.K.’s NI announce reciprocal membership agreement
With President Trump on a state visit to the U.K., in part to sign a landmark new agreement on U.S.-U.K. nuclear collaboration, a flurry of transatlantic partnerships and deals bridging the countries’ nuclear sectors have been announced.
The American Nuclear Society is taking an active role in this bridge-building by forming a reciprocal membership agreement with the U.K.’s Nuclear Institute.
Hiroshi Takahashi
Nuclear Science and Engineering | Volume 51 | Number 3 | July 1973 | Pages 296-315
Technical Paper | doi.org/10.13182/NSE73-A26607
Articles are hosted by Taylor and Francis Online.
The gamma-ray spectra produced by neutron-induced 238U reactions are analyzed, primarily using the statistical model, to provide the data for gamma-ray heating and shielding in the nuclear reactor. The gamma-ray spectra in the low energy neutron capture were calculated by taking into account the discrete and the continuous energy levels, and E1, M1, E2, and M2 electromagnetic transitions. The transition probabilities for primary gamma rays were taken from the data of Price et al. The calculated data are compared with John’s experimental data and Yost’s calculations. To calculate the gamma-ray spectra due to inelastic neutron scattering, the E2 and M1 transitions of the lowest 13 discrete levels of 238U were calculated by using the rotational vibrational model of Bohr-Mottelson. The gamma production cross section due to fast-neutron reactions (En > 2 MeV) and the prompt gamma-ray spectrum due to fission were calculated by taking into account the yrast levels in the cascade process, as proposed by Thomas and Grover. The calculated prompt gamma-ray spectrum and the total gamma-ray production cross section are discussed in comparison with the experimental data.
