Published January 24, 2018
| Version v1
Publication
High-accuracy determination of the 238U/ 235U fission cross section ratio up to ≈ 1 GeV at n_TOF at CERN
Contributors
Description
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.
Additional details
Identifiers
- URL
- https://idus.us.es/handle//11441/69493
- URN
- urn:oai:idus.us.es:11441/69493
Origin repository
- Origin repository
- USE