Abstract
Nobelium (259No, T1/2=58 min) was produced in bombardment of 248Cm target with 18O5+ ions. Next, it was oxidised by H5IO6 and loaded together with lanthanide tracers on a chromatographic column filled with cryptomelane MnO2. In the HNO3 elution curve two peaks are observed. First one is related to the nonoxidized No2+ and the second corresponds to No3+ close to positions of elution peaks of Ho3+ and Y3+. The ionic radius deduced from the elution position of No3+ is to be 89.4±0.7 pm.
