Isolation of Radioniobium from γ-Irradiated Molybdenum Oxide

抄録

A reverse-phase chromatographic isolation procedure for Nb from Mo and Tc is given. The separation is performed with TBP (tri-n-butyl phosphate) on celite column.
Molybdenum oxide was irradiated with 20 MeV bremsstrahlung, which produces a mixture of ^93mMo, ⁹⁹Mo; ^99mTc; ^91mNb, ⁹⁵Nb and ⁹⁶Nb. The irradiation was applied to a 6 N HCI solution of the target. Separation was repeated twice, which resulted in isolation of the radioniobium with a decontamination factor of 104 both for Mo and for Tc.
Decay analysis of the activity showed that radioniobium thus separated was composed of ^91mNb, ^95mNb, ⁹⁵Nb and ⁹⁶Nb. The γ-spectrum of ⁹⁶Nb was obtained by subtraction of the spectrum taken 119 hr after the end of irradiation from that of 74 hr.