Standardization of ~(152)Eu and ~(154)Eu by 4(pi)(beta)-4(pi)(gamma) coincidence method and 4(pi)(beta + gamma) integral counting

摘要

The 4(pi)(beta)-4(pi)(gamma) coincidence counting and 4pi(beta + gamma) integral counting techniques were applied for the standardization of ~(152)Eu and ~(154)Eu.In these techniques, the beta-detector is composed of two thin plastic scintillators sandwiching the source coupled with a slender photomultiplier tube. This beta-detector was inserted into a large well-type NaI(Tl) scintillation detector for gamma-ray detection, making a 4(pi)(beta)-4(pi)(gamma) detector configuration. The results obtained by the above two techniques were in good agreement and consistent with the results of international comparisons.