Normalized and BKG subtracted data for Det I
Source is 15.56 cm away from left
Source is 35.88 cm away from left
Source is 56.2 cm away from left
Source is 76.52 cm away from left
Source is 87 cm away from left
Calibration curve
Error bars represent the error on Mean value of fitted Co-60 source signal data.
So the slope is 0.1826 ns/cm or 5.476 cm/ns