Research Article

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

Figure 6

Typical experimental data on the count rate K versus distance R. Experimental statistical errors of K are within the symbols. Lines are the least-squares fits with the inverse-square function of equation (2) to data from 2 to 48 cm and data from 12 to 48 cm for 137Cs (a) and 60Co (b). The insert is the expanded figure showing the fitting of the data from 12 to 48 cm.
(a)
(b)