Measurement of the 238U(n, γ) cross section up to 80 keV with the Total Absorption Calorimeter at the CERN n_TOF facility

Scientific paper - Original scientific paper

• Author: T. Wright
• Author: ...
• Author: Damir Bosnar; MBZ: 134936
• Author: ...
• Author: Petar Žugec
• Collaboration: n_TOF Collaboration
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

The radiative capture cross section of a highly pure (99.999%), 6.125(2) grams and 9.56(5)×10^−4 atoms/barn areal density 238U 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.

• Keywords (english): 238U(n; γ); Total Absorption Calorimeter; n_TOF; CERN
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review C
• Numbering: vol. 96, no. 6, 064601
• p-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.96.064601
• URN:NBN: urn:nbn:hr:217:387200
• Publication: 2017
• Document URL: https://journals.aps.org/prc/abstract/10.1103/PhysRevC.96.064601
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2017 American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Received 24 August 2017; published 1 December 2017.
• Created on: 2020-02-28 10:44:27