Neutron capture of Sb on the s-process temperatures at the CSNS Back-n

The measurement of neutron capture cross sections of natSb from 1 eV to 1 MeV was performed at the Back-n facility of the Chinese Spallation Neutron Source (CSNS) using the time-of-flight (TOF) method and the C6D6 liquid scintillation detectors. The detector efficiency was corrected using the pulse height weighting technique (PHWT) method. The final cross sections fitted by the R-matrix codes match well with those given by the evaluation libraries ENDF/B-VIII.1, JEFF-4.0, JENDL-5 and TENDL-2023. The TALYS code was used to describe the experiment results at the unresolved resonance region. The Maxwellian-averaged cross sections (MACS) were computed and they show good agreements with the recommended values.