Application of multidimensional spectrum analysis for neutron activation analysis

Feasibility of the method of multidimensional gamma -ray spectrometer for n eutron activation analysis was examined. Reference igneous rock (JP-1, JB-1 a and JB-1) samples issued by the Geological Survey of Japan (GSJ) and the Allende meteorite reference sample were irradiated in a research reactor, a nd multiple gamma -rays from the produced radioisotopes via neutron capture reactions were measured using an array of twelve germanium detectors with EGO Compton suppressors called GEMINI. Simultaneously thirty elements were observed with no chemical separation. The observed smallest component was E u contained in JP-1 with abundance of 4 ppb.