Procedures for Db chemical characterization in off-line experiments

作者：Tereshatov E E^*; Gostic J M; Henderson R A; Shaughnessy D A; Moody K J

来源：Journal of Radioanalytical and Nuclear Chemistry, 2012, 293(1): 331-337.

DOI：10.1007/s10967-012-1737-7

• Niobium
• Tantalum
• Dubnium
• Group V elements
• Anion-exchange separation

A new procedure to isolate carrier-free isotopes of Nb and Ta after a 12-MeV proton bombardment of a natural Hf foil has been considered. The cross section of the corresponding Hf-nat(p,x)Ta-179 reaction has been estimated for the first time as 5.4 +/- A 0.5 mb. The isotopes that were produced were subsequently used for development of procedures for the chemical characterization of element 105 (Db). HF/HNO3 and HNO3/H2O2 media have been chosen and the parameters of the experiments have been optimized. Based on the results obtained in this work, off-line experimental procedures have been proposed for the evaluation of the chemical behavior of Db.

• 出版日期2012-7