Measurement and analysis of Gd-155,Gd-157(n,gamma) from thermal energy to 1 keV

C. Massimi, O Aberle, J. Andrzejewski, L Audouin, M Bacak, J. Balibrea, M Barbagallo, F. Becvar, E. Berthoumieux, J. Billowes, D. Bosnar, Anton Wallner

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    We have measured the capture cross section of the Gd-155 and Gd-157 isotopes between 0.025 eV and 1 keV. The capture events were recorded by an array of 4 C6D6 detectors, and the capture yield was deduced exploiting the total energy detection system in combination with the Pulse Height Weighting Techniques. Because of the large cross section around thermal neutron energy, 4 metallic samples of different thickness were used to prevent problems related to self-shielding. The samples were isotopically enriched, with a cross contamination of the other isotope of less than 1.14%. The capture yield was analyzed with an R-Matrix code to describe the cross section in terms of resonance parameters. Near thermal energies, the results are significantly different from evaluations and from previous time-of-flight experiments. The data from the present measurement at n_TOF are publicly available in the experimental nuclear reaction database EXFOR.
    Original languageEnglish
    Title of host publicationAccurate measurement of the standard 235U(n,f) cross section from thermal to 170 keV neutron energy
    Place of PublicationChina
    PublisherEPJ Web of Conferences
    ISBN (Print)978-2-7598-9106-1
    DOIs
    Publication statusPublished - 2020
    Event2019: International Conference on Nuclear Data for Science and Technology - Beijing, China, China
    Duration: 1 Jan 2019 → …

    Conference

    Conference2019: International Conference on Nuclear Data for Science and Technology
    Country/TerritoryChina
    Period1/01/19 → …
    OtherMay 19-24

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