Preparation of high-resolution U α-sources by electrodeposition from various electrolyte solutions
نویسندگان
چکیده
− In this paper the source preparation procedure for high-resolution U sources is described. This work was done in a collaboration between CIEMAT and IRMM within the frame of MetroFission, a project of the European Metrology Research Programme, in order to determine the alpha-emission probabilities of U. U was deposited from organic (iso-propanol) and inorganic (H2SO4/(NH4)2SO4, saturated NH4NO3) electrolyte solutions on metal backings. Preliminary results show that the U source quality is significantly better when making them in saturated NH4NO3 than in the two other electrolytes. By this method sources of 18,6-22 mm diameter, 26 μg cm surface density, 16-18 keV resolution and a peak to valley ratio higher than 50 could be made. This reconciles the inherently opposing requirements of high resolution and sufficient count rate needed to determine the alpha–emission probabilities accurately.
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