In this study, an in-house 152Eu calibration source was produced from a custom epoxy matrix with a density of r ¼ g cm3 , which is chemically stable and durable form after its solidification. The homogeneity of 152Eu in matrix was obtained better than 98%. For a Marinelli beaker geometry, an efficiency calibration procedure was applied to a n-type, coaxial, relative efficient HPGe detector in the energy range of keV by using in-house 152Eu calibration source. | Efficiency calibration of a coaxial HPGe detector-Marinelli beaker geometry using an 152Eu source prepared in epoxy matrix and its validation by efficiency transfer method
