Measurement of the 77Se(n, γ) cross section up to 200 keV at the n_TOF facility at CERN TOF Collaboration Porras Sánchez, José Ignacio Praena Rodríguez, Antonio Javier Torres Sánchez, Pablo The 77 Se ( n , γ ) reaction is of importance for 77 Se abundance during the slow neutron capture process in massive stars. We have performed a new measurement of the 77 Se radiative neutron capture cross section at the Neutron Time-of-Flight facility at CERN. Resonance capture kernels were derived up to 51 keV and cross sections up to 200 keV. Maxwellian-averaged cross sections were calculated for stellar temperatures between k T = 5 keV and k T = 100 keV , with uncertainties between 4.2% and 5.7%. Our results lead to substantial decreases of 14% and 19% in 77 Se abundances produced through the slow neutron capture process in selected stellar models of 15 M ⊙ and 2 M ⊙ , respectively, compared to using previous recommendation of the cross section. 2023-10-09T08:54:54Z 2023-10-09T08:54:54Z 2023-06-12 journal article Sosnin, N. V., Lederer-Woods, C., Krtička, M., Garg, R., Dietz, M., Bacak, M., ... & n_TOF Collaboration. (2023). Measurement of the Se 77 (n, γ) cross section up to 200 keV at the n_TOF facility at CERN. Physical Review C, 107(6), 065805.[DOI: 10.1103/PhysRevC.107.065805] https://hdl.handle.net/10481/84905 10.1103/PhysRevC.107.065805 eng info:eu-repo/grantAgreement/EC/ERC/677497 http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional American Physical Society