Abstract
Recent progress in production and chemistry of the transactinide elements, element 107 bohrium (Bh) and element 104 rutherfordium (Rf), is reviewed. First information on chemical properties of Bh was obtained in gas chromatographic experiments on an atom-at-a-time basis. Chemical separation and characterization of 6 atoms of 267Bh produced in the bombardment of a 249Bk target with 22Ne beams are outlined. Aqueous chemistry of Rf being performed at JAERI (Japan Atomic Energy Research Institute) is briefly summarized. On-line anionexchange experiments in acidic solutions on 261Rf produced in the 248Cm (18O, 5n) reaction were conducted with a rapid ion-exchange separation apparatus. Characteristic anion-exchange behavior of Rf is discussed.
