No abstract

Cross-sections for the production of 210 Po nuclei in 6 He + 206 Pb collisions over the incident energy range 14-18 MeV were measured by means of the activation technique and a radiochemical analysis. The elastic scattering at 18.0 MeV was also measured providing a precise value for the 210 Po production cross-section at this energy. The results are at variance with the earlier experimental data and rather in accord with the predictions of a density-dependent barrier penetration model for the fusion process. A proper treatment of beam energy distribution for the evaluation of the activation data is discussed.

No abstract

In this work three radiochemical procedures are presented for the determination of 99 Tc in aqueous environmental samples by ICP-MS. Technetium is pre-concentrated from a dilute solution by a reduction-precipitation process using FeSO 4 as the reducing agent. The precipitate is treated to extract and isolate Tc by three alternative methods which combine ionic exchange, with conventional or TEVA resins, and solvent extraction techniques using TBP. Special emphasis is paid to isolating the technetium from Mo and Ru, which are the major interfering elements for the mass spectrometric determination of 99 Tc.

No abstract

No abstract

No abstract

No abstract