Figure 10
Collimated (ϕ = 1 mm) 57Co spectra of a collecting anode strip in PTF geometry at different irradiation positions. The energy spectra show photopeak centroid shifts of about 6% from the cathode to the anode side; the energy resolution is 3.2% and 7.5% FWHM at 122.1 keV near the cathode and anode, respectively. |