Effects of Na and K co-doping on growth and scintillation properties of Eu:SrI2 crystals. (July 2016)

• Record Type: Journal Article
• Authors: Ito, Tomoki; Yokota, Yuui; Kurosawa, Shunsuke; Kral, Robert; Pejchal, Jan; Ohashi, Yuji; Kamada, Kei; Nikl, Martin; Yoshikawa, Akira
• Is Part Of: Radiation measurements. Volume 90(2016:Jul.)
• Page Start: 157
• Page End: 161
• Publication Date: 2016-07
• Subjects: Eu:SrI2 -- Scintillator -- Single crystal -- Alkali metal -- Light yield -- Non-proportionality; 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.2016.01.025
• Languages: English
• ISSNs: 1350-4487

Abstract

Abstract: We grew Na and K co-doped Eu:SrI2 [Na, Eu:SrI2 and K, Eu:SrI2 ] crystals by a modified micro-pulling-down method to reveal the co-doping effects on the crystal growth and scintillation properties. The non-codoped, Na0.5%, Na1.0%, K0.5% and K1.0%, Eu:SrI2 crystals indicated high transparency while the milky parts were generated in the Na5.0% and K5.0%, Eu:SrI2 crystals. The light yields of Na, Eu:SrI2 and K, Eu:SrI2 crystals under γ-ray irradiation were decreased by the Na and K co-doping. On the other hand, there was a small change within 940–1020 ns in the decay times by the Na and K co-doping. In the light yield proportionality under γ-ray irradiation, the non-proportionality in the low energy region was improved by Na and K co-doping. Highlights: Na or K co-doped Eu:SrI2 crystals were grown by the modified μ-PD method. The milky parts were generated in the Na5.0% and K5.0%, Eu:SrI2 crystals. The light yield of Eu:SrI2 was decreased by the Na or K co-doping. The decay times of Eu:SrI2 were almost constant by the Na or K co-doping. The non-proportionalitywas improved in the low energy region by the K co-doping.