Separation of W from Ta, Hf, Lu and Mo by BPHAC5H11OH/HCl extraction system(Model experiments for chemical study of seaborgiumthe 106th element)

摘要

In the batch experiment with W, Ta, Hf, Lu and Mo as radiotracers,rna new rapid radiochemical isolation procedure for element tungsten has been develrnoped by using radiochemical separation method and γ spectrum measurement techrnnique. With Voltalef powder carried 2％(W/V) BPHA(Benzoylphenylhydroxylamine)rnC5H11OH (iso-amyl-alcohol) organic solution, radioactive W was adsorbed on the rnVoltalef column in the 4mol/L hydrochloric acid system. Hf, Lu and Mo fractions rnpassed through the Voltalef column rapidly and partial Ta activities retained on thernVoltalef column, respectively. Following this, W fraction was eluted completely with rn1％Na3C6H5O7(sodium citrate)-5％(W/V) NH4OH solution and no Hf, Lu, Ta and rnMo activities passed through the Voltalef extraction chromatographic column. The rnprocedure was simultaneously used to isolate W from Er target bombarded with a low rnenergy 12C beams. By means of this separation system, it is one of the possible way to develop an isolation procedure of Sg, supposing the chemical property of Sg is similar to that of tungsten.