RESUMO
The excitation function of the proton exchange reactions on gold was investigated in the energy range from threshold up to 20MeV. We presented our experimental results upto 14MeV stacked-foil technique was used, the target was of high purity gold foils (99.99%.) Reactions cross-sections and excitation functions were studied. Both isomeric level cross sections of (197)Hg were measured and calculated theoretically using the DDHMS routine of the EMPIRE-II (v2.19) code. Isomeric cross-section ratios for the pair (197m,g)Hg were calculated and presented as a function of proton energy.
Assuntos
Ouro/química , Ouro/efeitos da radiação , Radioisótopos de Mercúrio/química , Radioisótopos de Mercúrio/efeitos da radiação , Modelos Químicos , Simulação por Computador , Radioisótopos de Mercúrio/isolamento & purificação , PrótonsRESUMO
The radioisotope 203Hg is used in university toxicology research experiments. When our commercial vendor ceased the production of the high specific activity 203Hg we required, an alternative source was sought. Other commercial sources were investigated without success leaving the synthesis of this radioisotope to us. This paper outlines the method we used to synthesize 203Hg and provides a summary of our results to date and a discussion of our experiences.
Assuntos
Radioisótopos de Mercúrio/isolamento & purificação , Radioisótopos de Mercúrio/toxicidade , Contaminação de Equipamentos/prevenção & controle , Física Médica , Humanos , Pesquisa , SegurançaRESUMO
A radiochemical method of separation of 203Hg from 181Hf is described. The method involves separation by Dowex 50W- X 8, 100-200 mesh, cation exchange resin using 1 M hydrochloric acid as the eluant. The chemical yield for the separation of mercury is > 85% and the decontamination factor is > 10(4). The 181Hf can be eluted from the column by 4 M HCl.
