Maximum scintillation yields in Nal(Tl) and CsI(Tl) crystals estimated from the scintillation model for liquid rare gases

摘要

The maximum scintillation yields in Nal(Tl) and CsI(Tl) crystals were estimated theoretically by applying the scintillation model for liquid rare gases to crystal scintillators. Average energies required to produce one scintillation photon in the maximum scintillation yield, W_(so), were estimated to be 10.6 ± 0.3 or 11.6 ± 0.3 eV for Nal(Tl) and 11.6 ± 0.3 or 12.5 ± 0.3 eV for CsI(Tl). The new experiment on scintillation yields gives W_(so) of 10.8 ± 2.0 eV for Nal(Tl) and 11.3 ± 2.1 or 9.3 ± 1.7 eV for CsI(Tl). The values show good agreement with the theoretical estimations. These results demonstrate that the scintillation model in liquid rare gases is applicable to inorganic scintillators such as Nal(Tl) and CsI(Tl) crystals.