Academic Journal
Scission neutron emission for 252Cf(sf), within the sudden approximation framework.
| Τίτλος: | Scission neutron emission for 252Cf(sf), within the sudden approximation framework. |
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| Συγγραφείς: | Guezet, F.1 (AUTHOR), Carjan, N.1,2 (AUTHOR) carjan@cenbg.in2p3.fr, Rizea, M.2 (AUTHOR) |
| Πηγή: | European Physical Journal A -- Hadrons & Nuclei. Aug2026, Vol. 62 Issue 8, p1-11. 11p. |
| Θεματικοί όροι: | *Neutron emission, *Neutron multiplicity, *Nuclear fission, *Neutrons, *Nuclear models, *Approximation error |
| People: | Schroedinger, Erwin, 1887-1961 |
| Περίληψη: | At scission, a highly deformed nucleus splits into two fragments that can sometimes be accompanied by emission of a third, much lighter, partner. Experimentally, proton and alpha emission at times close to scission has been observed but scission neutrons have not been clearly identified so far. In this study, we focus, using a theoretical microscopic model, on the emission of neutrons at the moment of scission of 252 Cf. For this, approximate description of the scission process is proposed based on the solution of the bi-dimensional stationary Schrödinger equation, for the most probable mass division of 252 Cf(sf): A L / A H = 109 / 143 . It considers a diabatic coupling between the neutron degree of freedom and the sudden changing neutron-nucleus potential during the scission process which is supposed to start when the radius of the neck separating the two fragments is ≈ 2 fm. The physical quantities analyzed in this work reveal that scission neutrons have specific characteristics. These neutrons are mainly emitted from the neck region. The sudden approximation used gives, for 252 Cf, an upper limit for the scission neutron multiplicity of 0.89 and 0.91 n/fission, depending on the type of neutron correlation considered (Independent or BCS). They should represent, at most, a quarter of the total prompt neutrons (3.69 n/fission) observed experimentally. Furthermore, the mean kinetic energy distribution of scission neutrons reveals the presence of a long high-energy tail extending far beyond the limit of evaporated neutrons. This study thus highlights a potential signature of the scission neutron component of prompt fission neutrons. [ABSTRACT FROM AUTHOR] |
| Βάση Δεδομένων: | Academic Search Index |
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