Electron and photon responses of CWO scintillation crystal

Abstract

The electron response and photon response of cadmium tungstate crystal (CWO) scintillation crystal have been investigated. For the photon response measurement, the 133Ba, 22Na, 137Cs and 60Co were used as radioactive sources in the energy range of 356–1332 keV. For the electron response measurement, the 137Cs source with gamma energy at 662 keV was used for the measurement of the coincidence electron energy spectra at seven scattering angles from 30° to 120°. The seven consistent electron energies were found in the range of 101.27–443.27 keV. The light yield results for both techniques showed a slight increase when gamma energy increased. Besides, for the energy resolutions and electron energy resolutions, the graph showed the relationship between the electron energy resolution and the inverse of the square root of the electron energy.