Detector identification by waveform shape analysis for effective data acquisition: Improvements in time resolution and count rate for positron annihilation age-momentum correlation measurement

摘要

In this paper, we propose a detector identification method that uses waveform shape analysis. This method can be used in many experimental contexts involving detectors, leading to effective data acquisition. Detector identification can additionally be used for other critical tasks, such as determining detector position. In this study, we used the proposed detector identification method to perform positron annihilation age-momentum correlation measurements. Instead, of one detector, four scintillation detectors were used for detecting 1.275 keV gamma-rays from Na-22, a positron emitter. This method resulted in a fourfold higher count rate. Therefore small scintillators that are inevitable to have a low count rate could be also used for scintillation detectors to improve the time resolution, as a favourable time resolution such as 170 ps (full width at half maximum) is often required in research.