Abstract
The trapping of hydrogen in niobium by nitrogen interstitials was investigated by resistance measurements. The results showed that only about one hydrogen atom can be trapped per nitrogen interstitial at low temperatures and that the trapping enthalpy is 0.12+or-0.02 eV. Due to the trapping process the hydrogen-induced resistivity increase is reduced by about 40% and the occurrence of precipitations is shifted to higher hydrogen concentrations.