Artículo
High-accuracy determination of the 238U/ 235U fission cross section ratio up to ≈ 1 GeV at n_TOF at CERN
Autor/es | Paradela, Carlos
Calviani, M. Tarrío, D. Leal Cidoncha, E. Leong, L. S. Tassan-Got, L. Le Naour, C. Durán, Ignacio Colonna, Nicola Audouin, Laurent Cortés Giraldo, Miguel Antonio Lozano Leyva, Manuel Luis Quesada Molina, José Manuel Praena Rodríguez, Javier |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2015 |
Fecha de depósito | 2018-01-24 |
Publicado en |
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Resumen | The 238U to 235U fission cross section ratio has been determined at n_TOF up to ≈1 GeV, with two different
detection systems, in different geometrical configurations. A total of four datasets has been collected and
compared. ... The 238U to 235U fission cross section ratio has been determined at n_TOF up to ≈1 GeV, with two different detection systems, in different geometrical configurations. A total of four datasets has been collected and compared. They are all consistent to each other within the relative systematic uncertainty of 3–4%. The data collected at n_TOF have been suitably combined to yield a unique fission cross section ratio as a function of neutron energy. The result confirms current evaluations up to 200 MeV. Good agreement is also observed with theoretical calculations based on the INCL++/Gemini++ combination up to the highest measured energy. The n_TOF results may help solve a long-standing discrepancy between the two most important experimental datasets available so far above 20 MeV, while extending the neutron energy range for the first time up to ≈1 GeV. |
Cita | Paradela, C., Calviani, M., Tarrío, D., Leal Cidoncha, E., Leong, L.S., Tassan-Got, L.,...,Praena Rodríguez, J. (2015). High-accuracy determination of the 238U/ 235U fission cross section ratio up to ≈ 1 GeV at n_TOF at CERN. Physical Review C - Nuclear Physics, 91 (2), 1-11. |
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