This method describes a simultaneous electrodeposition procedure that is specifically adapted for the source preparation of transuranic elements including Np,Pu,Am and Cm for high resolution alpha spectrometric measurement.The effects of electrolyte concentration,pH of buffer,current density and the plating time on the source quality were examined in order to optimize the conditions and to obtain the maximum yield.The electrodeposition yields of ~(237)Np,~(238)Pu,~(243)Am and ~(244)Cm are higher than 96% wi...