Scintillation timing characteristics of (La, Gd)2Si2O7:Ce and Gd2SiO5:Ce single crystal scintillators: A comparative study. (September 2016)

• Record Type: Journal Article
• Authors: Chewpraditkul, Weerapong; Sakthong, Ongsa; Chewpraditkul, Warut; Yawai, Nattasuda; Szczesniak, Tomasz; Swiderski, Lukasz; Moszynski, Marek; Kurosawa, Shunsuke; Murakami, Rikito; Horiai, Takahiko; Yoshikawa, Akira; Nikl, Martin
• Is Part Of: Radiation measurements. Volume 92(2016:Sep.)
• Page Start: 49
• Page End: 53
• Publication Date: 2016-09
• Subjects: Coincidence time resolution -- Energy resolution -- (La, Gd)2Si2O7:Ce, Gd2SiO5:Ce -- Scintillation decays; Nuclear emulsions -- Periodicals; Particle tracks (Nuclear physics) -- Periodicals; Thermoluminescence -- Periodicals; Cosmic rays -- Periodicals; Radiation -- Measurement -- Periodicals; Radiometry -- Periodicals; Radiation Monitoring -- Periodicals; Émulsions nucléaires -- Périodiques; Particules (Physique nucléaire) -- Traces -- Périodiques; Thermoluminescence -- Périodiques; Rayonnement cosmique -- Périodiques; Radiométrie -- Périodiques; 539.77
• DOI: 10.1016/j.radmeas.2016.06.008
• Languages: English
• ISSNs: 1350-4487

Abstract

Abstract: The scintillation timing characteristics of (La, Gd)2 Si2 O7 :Ce (GPSLa23.5%:Ce) single crystal were studied and compared with Gd2 SiO5 :Ce (GSO:Ce) single crystal. The photoelectron yield, scintillation decay times and coincidence time resolution were measured. At 511 keV γ-rays, the photoelectron yield of 10, 770 ± 500 phe MeV −1 and energy resolution of 5.4 ± 0.2% obtained for GPSLa23.5%:Ce are much better than those of 3350 ± 160 phe MeV −1 and 7.8 ± 0.3% obtained for GSO:Ce. The scintillation decay time profile was measured by the time-correlated single photon counting technique using a fast-slow coincidence setup. In both materials the comparable rise times of several nanoseconds are present. The fast component decay time of 56 ns with relative intensity of 49% obtained for GPSLa23.5%:Ce is inferior to that of 32 ns(88%) obtained for GSO:Ce. Consequently, the coincidence time resolution of GPSLa23.5%:Ce is slightly worse than that of GSO:Ce. The normalized time resolution was also discussed in terms of a number of photoelectrons and decay time of the scintillation pulse. Highlights: Scintillation characteristics of GPSLa23.5%:Ce and GSO:Ce were compared. Both crystals showed slow rise-time characteristics in their scintillation pulses. Energy resolution of 5.4% @511 keV was obtained for GPSLa23.5%:Ce. GPSLa23.5%:Ce showed higher contribution of slow scintillation light. Coincidence time resolution of 660 ps was obtained for GPSLa23.5%:Ce.