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(a) Spectra of the 137Cs, 60Co and background in linear y scale. The Compton backscattering peaks, located exactly where expected, testify the goodness of the linear calibration. (b) Same plot in logarithmic y scale. The energy resolution at the 137Cs peak (662 keV) was 6.8%, and at the higher 60Co peak (1330 keV) it was 4.3%.
