Investigating new activators for small-bandgap LaX3 (X = Br, I) scintillators

Daniel Rutstrom; Robyn Collette; Luis Stand; Matthew Loyd; Yuntao Wu; Merry Koschan; Charles L. Melcher; Mariya Zhuravleva

doi:10.1016/j.jcrysgro.2017.12.015

Investigating new activators for small-bandgap LaX₃ (X = Br, I) scintillators

Daniel Rutstrom, Robyn Collette, Luis Stand, Matthew Loyd, Yuntao Wu, Merry Koschan, Charles L. Melcher, Mariya Zhuravleva

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

2 Scopus citations

Abstract

Luminescence and scintillation properties of Bi³⁺, Sb³⁺, and Eu²⁺-doped LaI₃ and LaBr₃ were explored. Out of the three dopants investigated, Eu²⁺ was the most promising new activator for small-bandgap LaX₃ (X = Br, I) and was further studied in the mixed-halide LaBr_3−xI_x. Crystals were grown from the melt using the vertical Bridgman method. LaBr₃:Eu²⁺ 0.5% (mol) had the most favorable scintillation properties with a light output of 43,000 ph/MeV and 6% energy resolution at 662 keV. Performance of LaBr_3−xI_x:Eu²⁺ worsened for most samples as iodide concentration was increased. Room-temperature scintillation of LaI₃:Eu²⁺ 0.1% and 0.5% was observed and is the first case of room-temperature emission reported for doped LaI₃.

Original language	English
Pages (from-to)	251-257
Number of pages	7
Journal	Journal of Crystal Growth
Volume	483
DOIs	https://doi.org/10.1016/j.jcrysgro.2017.12.015
State	Published - Feb 1 2018
Externally published	Yes

Funding

This material is based on work supported in part by the Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium under Award Number DE-NA-0003180 . This work has also been supported by the US Department of Homeland Security, Domestic Nuclear Detection Office , under competitively awarded grants #2014-DN-077-ARI088-3 and #2012-DN-077-ARI067-05 . This support does not constitute an express or implied endorsement on the part of the Government.

Funders	Funder number
U.S. Department of Homeland Security
National Nuclear Security Administration	DE-NA-0003180
Domestic Nuclear Detection Office	2012-DN-077-ARI067-05, 2014-DN-077-ARI088-3

Keywords

A1. Characterization
A2. Bridgman technique
A2. Growth from melt
B1. Halides
B1. Rare earth compounds
B3. Scintillators

Access to Document

10.1016/j.jcrysgro.2017.12.015

Cite this

@article{e91dc6c8947c40809f5e2b0a056162af,

title = "Investigating new activators for small-bandgap LaX3 (X = Br, I) scintillators",

abstract = "Luminescence and scintillation properties of Bi3+, Sb3+, and Eu2+-doped LaI3 and LaBr3 were explored. Out of the three dopants investigated, Eu2+ was the most promising new activator for small-bandgap LaX3 (X = Br, I) and was further studied in the mixed-halide LaBr3−xIx. Crystals were grown from the melt using the vertical Bridgman method. LaBr3:Eu2+ 0.5% (mol) had the most favorable scintillation properties with a light output of 43,000 ph/MeV and 6% energy resolution at 662 keV. Performance of LaBr3−xIx:Eu2+ worsened for most samples as iodide concentration was increased. Room-temperature scintillation of LaI3:Eu2+ 0.1% and 0.5% was observed and is the first case of room-temperature emission reported for doped LaI3.",

keywords = "A1. Characterization, A2. Bridgman technique, A2. Growth from melt, B1. Halides, B1. Rare earth compounds, B3. Scintillators",

author = "Daniel Rutstrom and Robyn Collette and Luis Stand and Matthew Loyd and Yuntao Wu and Merry Koschan and Melcher, {Charles L.} and Mariya Zhuravleva",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

month = feb,

day = "1",

doi = "10.1016/j.jcrysgro.2017.12.015",

language = "English",

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journal = "Journal of Crystal Growth",

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T1 - Investigating new activators for small-bandgap LaX3 (X = Br, I) scintillators

AU - Rutstrom, Daniel

AU - Collette, Robyn

AU - Stand, Luis

AU - Loyd, Matthew

AU - Wu, Yuntao

AU - Koschan, Merry

AU - Melcher, Charles L.

AU - Zhuravleva, Mariya

PY - 2018/2/1

Y1 - 2018/2/1

N2 - Luminescence and scintillation properties of Bi3+, Sb3+, and Eu2+-doped LaI3 and LaBr3 were explored. Out of the three dopants investigated, Eu2+ was the most promising new activator for small-bandgap LaX3 (X = Br, I) and was further studied in the mixed-halide LaBr3−xIx. Crystals were grown from the melt using the vertical Bridgman method. LaBr3:Eu2+ 0.5% (mol) had the most favorable scintillation properties with a light output of 43,000 ph/MeV and 6% energy resolution at 662 keV. Performance of LaBr3−xIx:Eu2+ worsened for most samples as iodide concentration was increased. Room-temperature scintillation of LaI3:Eu2+ 0.1% and 0.5% was observed and is the first case of room-temperature emission reported for doped LaI3.

AB - Luminescence and scintillation properties of Bi3+, Sb3+, and Eu2+-doped LaI3 and LaBr3 were explored. Out of the three dopants investigated, Eu2+ was the most promising new activator for small-bandgap LaX3 (X = Br, I) and was further studied in the mixed-halide LaBr3−xIx. Crystals were grown from the melt using the vertical Bridgman method. LaBr3:Eu2+ 0.5% (mol) had the most favorable scintillation properties with a light output of 43,000 ph/MeV and 6% energy resolution at 662 keV. Performance of LaBr3−xIx:Eu2+ worsened for most samples as iodide concentration was increased. Room-temperature scintillation of LaI3:Eu2+ 0.1% and 0.5% was observed and is the first case of room-temperature emission reported for doped LaI3.

KW - A1. Characterization

KW - A2. Bridgman technique

KW - A2. Growth from melt

KW - B1. Halides

KW - B1. Rare earth compounds

KW - B3. Scintillators

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U2 - 10.1016/j.jcrysgro.2017.12.015

DO - 10.1016/j.jcrysgro.2017.12.015

M3 - Article

AN - SCOPUS:85037984290

SN - 0022-0248

VL - 483

SP - 251

EP - 257

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

ER -

Investigating new activators for small-bandgap LaX₃ (X = Br, I) scintillators

Abstract

Funding

Keywords

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Cite this

Investigating new activators for small-bandgap LaX3 (X = Br, I) scintillators

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this

Investigating new activators for small-bandgap LaX₃ (X = Br, I) scintillators