The neutron radiative capture cross section of 93Nb was measured at the Gamma Total Absorption Facility (GTAF) installed on the Back-n beamline of the China Spallation Neutron Source (CSNS) by the time-of-flight (TOF) method. The data reduction procedure included pulse-shape discrimination, total \(\gamma\) -ray energy and multiplicity selections, proton beam normalization, dead time correction, subtraction of beam-related and ambient backgrounds, estimation of the scattered-neutron background, and neutron flux normalization. The capture yield spectrum was determined up to 2 keV, and resonance parameters in the resolved-resonance region below 200 eV were extracted with the SAMMY code after normalization to the saturated resonance of 197Au. The uncertainty budget includes counting statistics, neutron flux monitoring, sample areal density, and flight path calibration. The fitted yield reproduces the measured spectrum satisfactorily, whereas differences remain between the extracted resonance parameters and evaluated libraries. These differences are mainly associated with the limited signal-to-background ratio in the low-cross-section region, 181Ta impurities in the sample, and possible mismatches between the adopted resolution function and the actual Back-n response during the measurement. The present results provide new experimental constraints for future measurements and evaluations of 93Nb(n, \(\gamma\) ) data over a broader energy range.
