Energy Calibration and Inverse-Square Law of Radiation in Gamma-Ray Measurement Using a Scintillation Detector for Laboratory Experiments

Figure 3

Typical measured gamma-ray energy spectra of ¹³⁷Cs (a), ⁶⁰Co (b), and ²²Na (c). All sources were placed at a distance of 2 cm from the detector. (a) Measured for 10 min and (b) and (c) measured for 120 min.

(a)

(b)

(c)