期刊
PHYSICAL REVIEW C
卷 96, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.96.064601
关键词
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资金
- UK Nuclear Decommissioning Authority (NDA)
- EPSRC
- CERN
- EC-FP7 ANDES [FP7-249671]
- ENRESA under the CIEMAT-ENRESA agreement
- Spanish Ministry of Science and Innovation [FPA2005-06918-C03-01]
- Engineering and Physical Sciences Research Council [EP/I003258/1, EP/N00700X/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/L005794/1, ST/N00244X/1] Funding Source: researchfish
- EPSRC [EP/I003258/1, EP/N00700X/1] Funding Source: UKRI
- STFC [ST/N00244X/1, ST/L005794/1] Funding Source: UKRI
The radiative capture cross section of a highly pure (99.999%), 6.125(2) grams and 9.56(5) x 10(-4) atoms/barn areal density U-238 sample has been measured with the Total Absorption Calorimeter (TAC) in the 185 m flight path at the CERN neutron time-of-flight facility n_TOF. This measurement is in response to the NEA High Priority Request list, which demands an accuracy in this cross section of less than 3% below 25 keV. These data have undergone careful background subtraction, with special care being given to the background originating from neutrons scattered by the 238U sample. Pileup and dead-time effects have been corrected for. The measured cross section covers an energy range between 0.2 eV and 80 keV, with an accuracy that varies with neutron energy, being better than 4% below 25 keV and reaching at most 6% at higher energies.
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