Measurement and analysis of Gd-155, Gd-157(n,γ) from thermal energy to 1 keV Massimi, C. Porras Sánchez, José Ignacio Praena Rodríguez, Antonio Javier This research was partially funded by the European Atomic Energy Community (Euratom) Seventh Framework Programme FP7/2007-2011 under the Project CHANDA (Grant No. 605203). We acknowledge support from FPA2014-52823-C2-1-P (MINECO) and MSMT Czech Republic. 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. 2021-05-06T07:49:54Z 2021-05-06T07:49:54Z 2020-09-30 conference output EPJ Web of Conferences 239, 01041 (2020). [https://doi.org/10.1051/epjconf/202023901041] http://hdl.handle.net/10481/68353 10.1051/epjconf/202023901041 eng info:eu-repo/grantAgreement/EC/FP7/605203 http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España EDP Sciences