García Infantes, F.Praena, J.Casanovas-Hoste, A.Henkelmann, R.Köster, U.Aberle, O.Cortés Giraldo, Miguel AntonioGuerrero Sánchez, CarlosLerendegui Marco, JorgePérez Maroto, PabloPavón Rodríguez, J. A.Quesada Molina, José ManuelŽugec, P.2025-06-302025-06-302024-12-27García Infantes, F., Praena, J., Casanovas-Hoste, A., Henkelmann, R., Köster, U., Aberle, O.,...,Žugec, P. (2024). Measurement of the Yb 176 (n,γ) cross section at the n_TOF facility at CERN. Physical Review C, 110 (6), 064619. https://doi.org/10.1103/PhysRevC.110.064619.2469-99852469-9993https://hdl.handle.net/11441/174782Background: The 176Yb(n, γ ) 177Yb → 177Lu reaction is of interest in nuclear medicine as it is the preferred production route for 177Lu. This radioisotope has seen a very fast growth of usage in nuclear medicine in recent years due to its outstanding properties. New data on this reaction could provide useful information for production at new facilities. Purpose: We aim to resolve resonances in the 176Yb(n, γ ) 177Yb reaction for the first time. Previous capture measurement provided data at thermal point and encompassed integral measurements in the range from 3 keV to 1 MeV, where three time-of-flight measurements are available, but with low resolution to resolve the resonances. Transmission measurements from the 1970s resolved and analyzed some resonances. Method: We measure the neutron capture cross section of 176Yb(n, γ ) 177Yb by means of the time-of-flight technique at the Experimental Area 1 of the n_TOF facility at CERN using an enriched 176Yb2 O3 sample and an array of four C6D6 liquid scintillation detectors. Results: We have resolved 164 resonances up to 21 keV, including 96 new ones. We also provide new capture experimental data from 90 eV to 3 keV, and we extend the resolved resonance region up to 21 keV. In addition, resonance decay widths, γ and n, are provided for all resonances together with resonance energies. Conclusions: The 176Yb(n, γ ) 177Yb reaction has been measured, providing resonance parameters for the first time from a few eV to 21 keV. The analysis of the resonances has been carried out and compared with previous works and existing libraries, revealing discrepancies due to the new information on γ parameters. Our results are consistent with the n parameters obtained in transmission measurements.application/pdf16 p.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1103/PhysRevC.110.064619