Abstract
The theoretical prediction of the cross-sections in the determination of the structure materials used in the fission and fusion technology is very important in terms of reactor safety. Also, theoretical cross-sections are necessary to evaluate the performance of structure materials, especially, in the lack or absence of experimental data. Nickel base alloys are one of the wide ranges of structural materials used in fission and fusion reactors. Therefore, the excitation functions of the (n, 2n) reactions on the structure material nickel with neutrons producing via fusion reactions are investigated in this study. Thus, the excitation functions for 58,60 – 62,64Ni(n, 2n) reactions are calculated using some pre-equilibrium models which are the hybrid, the geometry depended hybrid and the two-component excitation models. The calculations are performed in the ALICE/ASH and the Talys 1.8 codes. Also, the equilibrium and pre-equilibrium effects on these reactions are investigated in this study. The obtained cross-sections are discussed and compared with the experimental data and the theoretical predicted data.
Kurzfassung
Die theoretische Vorhersage der Querschnitte bei der Bestimmung der in der Spalt- und Fusionstechnik verwendeten Strukturwerkstoffe ist für die Reaktorsicherheit von großer Bedeutung. Auch theoretische Querschnitte sind notwendig, um die Performance der Strukturmaterialien zu bewerten, vor allem dann, wenn experimentellen Daten nicht ausreichend sind oder vollständig fehlen. Nickelbasislegierungen sind eines der zahlreichen Strukturmaterialien, die in Spalt- und Fusionsreaktoren verwendet werden. Daher werden in dieser Studie die Anregungsfunktionen der (n, 2n)-Reaktionen auf das Strukturmaterial Nickel mit Neutronen, die über Fusionsreaktionen erzeugt werden, untersucht. Dabei werden die Anregungsfunktionen für 58,60 – 62,64Ni(n, 2n)-Reaktionen mit Hilfe von Vor-Gleichgewichtsmodellen berechnet. Dazu werden Hybrid-, geometrie-abhängige Hybrid- und Zweikomponenten-Anregungsmodelle verwendet. Die Berechnungen werden mit den Codes ALICE/ASH und Talys 1.8 durchgeführt. Auch die Gleichgewichts- und Vor-Gleichgewichtseffekte auf diese Reaktion werden in dieser Studie untersucht. Die erhaltenen Querschnitte werden diskutiert und mit den experimentellen Daten und den theoretisch vorhergesagten Daten verglichen.
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