Thermonuclear fusion and spallation reactions (α, n)

Nuclear Reactor Physics - Nuclear Reactions

Figure 1 - Phenomenology of nuclear reactions (according to [1] [2])

Figure 2 - Collision between two particles represented in the laboratory frame of reference (L) and in the center of mass frame of reference (CM)

Figure 3 - Various interactions between a neutron and a target nucleus are generally considered in nuclear reactor physics.

Figure 4 - Elastic and inelastic neutron scattering on a target nucleus

Figure 5 - Particle diffusion through a thin target. Notion of microscopic effective scattering cross-section

Figure 6 - Definition of solid angle ...

Figure 7 - Uranium 235 microscopic cross sections as a function of incident neutron energy, reconstructed by the NJOY cross section processing system. (from [BN 3 012])

Figure 8 - Diagram of Bohr&#039;s model of the compound nucleus (according to [13])

Figure 9 - Variation of the effective cross-section of the reaction ...

Figure 11 - Typology of &#34;non-bonded&#34; energy levels in the particle interaction – atomic nucleus

Figure 12 - Representation of an isolated resonance of iron 56 (at 24 keV) using Breit and Wigner&#039;s single-level formalism (according to [13])

Figure 14 - Double fission barrier (according to [18] [19] [20])

Figure 15 - Fission dynamics

Figure 16 - Fission neutron spectra (thermal neutron-induced fission)

Figure 17 - Delayed neutron emissions from the fission product 87Br

Figure 18 - Characteristic curves of the independent fission yields of uranium 235 by a thermal neutron and uranium 238 by a fast neutron

Figure 19 - Variation with interaction energy of the cross sections of different thermonuclear fusion reactions

Figure 20 - Phenomenology of spallation reactions (after [32] [33] [34] [35] [36] [37] [38] [39])

Figure 21 - Models describing spallation reactions (from [33] [34] [35] [36] [37] [38] [39])

Figure 22 - Examples of effective cross-sections of spallation reactions (according to [40])

Figure 23 - Number of neutrons produced by a proton at intermediate energies in various spallation targets (according to [39])

Figure 24 - Residual nuclide distribution in a thin uranium-238 target bombarded by a 1 GeV proton (according to [39])