Fuels and Materials Department;
Japan Atomic Energy Agency;
Oarai;
Ibaraki 311-1393;
Japan;
Experimental Fast Reactor Department;
Japan Atomic Energy Agency;
Oarai;
Ibaraki 311-1393;
Japan;
Department of Energy Engineering;
Nagoya University;
Nagoya 464-8603;
Japan;
Isord-10; niobium; reaction rate; material surveillance test; fast reactor; characteristic x-rays; experimental fast reactor joyo; resonance ionization mass spectrometry; hyperfine structure;