Neutron Capture Cross Section of Niobium-93 from 2.6 to 700 keV

The neutron capture cross section of stable ⁹³Nb was measured by time-of-flight methodology at the Oak Ridge Linear Electron Accelerator. Individual resonances were parameterized to 7.4 keV with energy resolution ≤0.14% full-width-at-half-maximum. The average cross section was deduced from 3 to 700 keV with an accuracy estimated at 3 to 5% SD. The average data to 100 keV are well fitted by strength functions, but the fluctuations about the fit are not consistent with an energy-independent level density proportional to 2J + 1 beyond 20 keV.