Investigation of the Relation of Decay Time Differences and $\alpha-\beta$ Ratios for Newly Developed Scintillators

Abstract

Recently, we found that the decay times between $\alpha $ particles and $\gamma $ photons were different for the recently developed scintillators. We also noticed that $\alpha - \beta $ ratios were different for these scintillators. We expect that there might be a relation between these two properties. Thus, we measured the $\alpha - \beta $ ratios and the decay time differences between $\alpha $ particles and $\gamma $ photons for the newly developed scintillators and investigated the relationship between them. We measured the $\alpha - \beta $ ratios and decay times for five scintillators: (LaGd)2Si2O7 (LaGPS), Gd2Si2O7 (GPS), ceramic Gd3Al2Ga3O12(GGAG), ceramic (YGd)3(GaAl)5O12:Ce (YGAG), and single-crystal Gd3Al2Ga3O12 (GAGG). After the measurements, we estimated the correlation between the $\alpha - \beta $ ratios and the decay time differences between $\alpha $ particles and $\gamma $ photons. Among these scintillators, as the $\alpha - \beta $ ratios increased, decay time differences decreased with the correlation coefficient ( $R^{2}$ ) of more than 0.8. We conclude that there was a negative correlation between $\alpha - \beta $ ratios and the decay time differences between $\alpha $ particles and $\gamma $ photons for the measured newly developed scintillators.