Developing Eu-152 into a standard for detector efficiency calibration

Abstract

A gamma-gamma coincidence experiment was performed to check the Eu-152 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 Sm-152 levels were added to the previously known set of levels fed in Eu-152 13-year decay. (C) 2003 Elsevier Ltd. All rights reserved.