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Developing 152Eu into a standard for detector efficiency calibration
Ruy M Castro1, Vito R Vanin, Paulo R Pascholati
1Laboratorio do Acelerador Linear, Instituto de Fisica, Universidade de Sao Paulo, Rua do Matao, travessa R 187, Sao Paulo, SP 05404-900, Brazil.
Abstract:
A gamma-gamma coincidence experiment was performed to check the 152Eu 13-year decay scheme and the placement of the observed gamma-ray transitions. The multi-detector array for residual activity measurement of the Linear Accelerator Laboratory was used. The source activity was 1 MBq, and about 10(9) coincidence events were observed. About 30 gamma's were placed in the decay scheme and four 152Sm levels were added to the previously known set of levels fed in 152Eu 13-year decay.