CdWO$_{4}$ and CsI Crystal Detectors

CdWO$_{4}$ scintillators were proposed for detecting geo-neutrino, neutrinoless double-beta decay, and dark matter. I used the energy resolution of three different sized CdWO$_{4}$ crystals for detecting $\gamma $-rays. The three crystals had diameters of 19mm but thicknesses of 5mm, 9mm, and 19mm. In using the 19mm CdWO$_{4}$ crystal, the energy resolution of a $^{137}$Cs source resulted in 11.4{\%} at 662 keV, and 6.5{\%} at 1173.2 keV and 8.6{\%} at 1332.5 keV for $^{60}$Co. As the sizes of the thickness decreases, a slight deterioration in energy resolution occurred with more Compton scattering in the energy spectrum. A CsI(Tl) crystal was also used for comparison; this crystal was 19mm in thicknesses and length. This crystal had an energy resolution for $^{137}$Cs of 12.3{\%} at 662 keV, 5.3{\%} at 1173.2 keV and 6.6{\%} at 1332.5 keV for $^{60}$Co. The CsI(Tl) crystal capable of measuring low energies in which x-ray peaks were visible with some sources. The CdWO$_{4}$ crystal was more beneficial when measuring gamma-ray energy close to 511 keV that is primary signature from geo-neutrino detection with $^{106}$Cd. Greater Compton scattering occurred with the CsI crystal when detecting higher energies. Using a number of smaller crystals allows for the development and characterization of these crystals.