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Sökning: WFRF:(Helgesson M)

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1.
  • Plompen, A. J. M., et al. (författare)
  • The joint evaluated fission and fusion nuclear data library, JEFF-3.3
  • 2020
  • Ingår i: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 56:7
  • Forskningsöversikt (refereegranskat)abstract
    • The joint evaluated fission and fusion nuclear data library 3.3 is described. New evaluations for neutron-induced interactions with the major actinides 235U, 238U and 239Pu, on 241Am and 23Na, 59Ni, Cr, Cu, Zr, Cd, Hf, W, Au, Pb and Bi are presented. It includes new fission yields, prompt fission neutron spectra and average number of neutrons per fission. In addition, new data for radioactive decay, thermal neutron scattering, gamma-ray emission, neutron activation, delayed neutrons and displacement damage are presented. JEFF-3.3 was complemented by files from the TENDL project. The libraries for photon, proton, deuteron, triton, helion and alpha-particle induced reactions are from TENDL-2017. The demands for uncertainty quantification in modeling led to many new covariance data for the evaluations. A comparison between results from model calculations using the JEFF-3.3 library and those from benchmark experiments for criticality, delayed neutron yields, shielding and decay heat, reveals that JEFF-3.3 performes very well for a wide range of nuclear technology applications, in particular nuclear energy.
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  • Ghetti, R., et al. (författare)
  • Influence of multiple sources on the two-neutron correlation function in Ni-induced, intermediate energy, heavy ion reactions
  • 2001
  • Ingår i: Physical Review C. Nuclear Physics. - : American Physical Society. - 0556-2813 .- 1089-490X. ; 64:1
  • Tidskriftsartikel (refereegranskat)abstract
    • The strength of the neutron-neutron correlation function from the E=45AMeV58Ni+27Al, natNi, and 197Au reactions depends on the neutron parallel velocity. This indicates the presence of multiple sources of neutron emission. We find these sources consistent with a dissipative, binary reaction mechanism as it is described by, e.g., Boltzmann-Uehling-Uhlenbeck calculations.
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  • Urrata, M, et al. (författare)
  • Neutron-neutron Intensity Interferometry in E/A = 45 MeV 58Ni + 27Al, 58Ni and 197Au Reactions
  • 2000
  • Ingår i: Physical Review C. Nuclear Physics. - : American Institute of Physics (AIP). - 0556-2813 .- 1089-490X. ; 62
  • Tidskriftsartikel (refereegranskat)abstract
    • Small angle neutron-neutron correlations have been measured for the E/A=45 MeV 58Ni+27Al, natNi, and 197Au reactions. Two-neutron correlation functions, both integrated and gated on the total momentum of the neutron pair, have been constructed. In order to explain these data, a fraction of fast "dynamical" emission is needed in addition to slower evaporative emission. The overall emission time scale is shorter for the symmetric system, indicating that the dynamical component is stronger in this case.
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