Application of the dynamic time over threshold method for semi-Gaussian signals

This paper proposes a numerical model of the dynamic time over threshold (DTOT) method for semi-Gaussian signals. The parameters are optimized accordingly in the design of a prototype DTOT circuit. A photomultiplier tube was coupled to a 2-inch LaBr₃ scintillator and connected to a charge sensitive preamplifier. The signal was semi-Gaussian shaped and sent to the DTOT circuit. The feasibility of the technique has been verified by the experimental results, which achieve 2.3% integral nonlinearity and 7-bit dynamic range.