GARFIELD, an apparatus designed to study complex nuclear events produced in the medium-low energy range (5-20 A MeV) heavy ion induced reactions, is presented. Its main components are two newly ...conceived drift chambers, based on the /spl Delta/E-E technique, for fragment and light charged particle identification (/spl theta/ = 30/spl deg/-150/spl deg/). The /spl Delta/E signals are delivered by 180 micro-strip detectors that amplify the primary ionization produced along the track left by the particle in the gas. The residual energy signals are given by 180 CsI(TI) crystals. Details both on the main characteristics of the single parts and of the whole apparatus are given. The drift chambers are complemented by a ring counter, an annular three element multi-telescope for forward emitted reaction products (/spl theta/ = 6/spl deg/-18/spl deg/), and a set of position sensitive parallel plate detectors (20/spl times/20 cm/sup 2/ each), used mainly for PLF or evaporation residues detection and mass measurements in dissipative collisions.
On the basis of the several studies recently published on the concentration of Hg and other heavy elements in seafish and especially tunafish a work as been carried out to determine the intake due to ...canned tunafish for the italian population. Instrumental activation analysis has been applied to tunafish canned samples avaible on the market in Rome. The following trace elements have been measured: Cr, Se, Hg, Cs, Fe, Zn, Co, Sb. The intake of Hg and other elements through the canned tuna foods have been evaluated on the basis of the production of such foods in Italy. The tunafish contribution to the total trace elements intakes has been determined by comparing the trace elements concentrations in the canned tunafish with those referred to diets that are representative for the italian population. The results obtained have demonstrated that the trace elements intake through the diet is not significantly influenced by the tunacanned foods intake.
