Effects of Na and K co-doping on growth and scintillation properties of Eu:SrI2 crystals

Tomoki Ito; Yuui Yokota; Shunsuke Kurosawa; Robert Kral; Jan Pejchal; Yuji Ohashi; Kei Kamada; Martin Nikl; Akira Yoshikawa

doi:10.1016/j.radmeas.2016.01.025

Effects of Na and K co-doping on growth and scintillation properties of Eu:SrI₂ crystals

Tomoki Ito, Yuui Yokota, Shunsuke Kurosawa, Robert Kral, Jan Pejchal, Yuji Ohashi, Kei Kamada, Martin Nikl, Akira Yoshikawa

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

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.

Original language	English
Pages (from-to)	157-161
Number of pages	5
Journal	Radiation Measurements
Volume	90
DOIs	https://doi.org/10.1016/j.radmeas.2016.01.025
Publication status	Published - 2016 Jul

Keywords

Alkali metal
Eu:SrI
Light yield
Non-proportionality
Scintillator
Single crystal

ASJC Scopus subject areas

Radiation
Instrumentation

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@article{61195086ab004a6d8df21c3d233da7ab,

title = "Effects of Na and K co-doping on growth and scintillation properties of Eu:SrI2 crystals",

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.",

keywords = "Alkali metal, Eu:SrI, Light yield, Non-proportionality, Scintillator, Single crystal",

author = "Tomoki Ito and Yuui Yokota and Shunsuke Kurosawa and Robert Kral and Jan Pejchal and Yuji Ohashi and Kei Kamada and Martin Nikl and Akira Yoshikawa",

year = "2016",

month = jul,

doi = "10.1016/j.radmeas.2016.01.025",

language = "English",

volume = "90",

pages = "157--161",

journal = "Radiation Measurements",

issn = "1350-4487",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Effects of Na and K co-doping on growth and scintillation properties of Eu:SrI2 crystals

AU - Ito, Tomoki

AU - Yokota, Yuui

AU - Kurosawa, Shunsuke

AU - Kral, Robert

AU - Pejchal, Jan

AU - Ohashi, Yuji

AU - Kamada, Kei

AU - Nikl, Martin

AU - Yoshikawa, Akira

PY - 2016/7

Y1 - 2016/7

N2 - 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.

AB - 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.

KW - Alkali metal

KW - Eu:SrI

KW - Light yield

KW - Non-proportionality

KW - Scintillator

KW - Single crystal

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