Development of High Resolution Resonance Ionization Mass Spectrometry for Neutron Dosimetry Technique with93Nb(n,n')93mNb Reaction

We have proposed an advanced technique to measure the 93m Nb yield precisely by Resonance Ionization Mass Spectrometry, instead of conventional characteristic X-ray spectroscopy. 93m Nb-selective resonance ionization is achievable by distinguishing the hyperfine splitting of the atomic energy levels between 93 Nb and 93m Nb at high resolution. In advance of 93m Nb detection, we could successfully demonstrate high resolution resonant ionization spectroscopy of stable 93 Nb using an all solid-state, narrow-band and tunable Ti:Sapphire laser system operated at 1 kHz repetition rate.