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

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

doi:10.1016/j.jcrysgro.2017.12.015

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

Full Record
Other Related Research

Abstract

In this study, 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. Finally, 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.

Authors:

Rutstrom, Daniel ^[1]; Collette, Robyn ^[2]; Stand, Luis ^[3]; Loyd, Matthew ^[1]; Wu, Yuntao ^[1]; Koschan, Merry ^[4]; Melcher, Charles L. ^[3]; Zhuravleva, Mariya ^[1]

Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center and Department of Materials Science and Engineering
Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering
Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center, Department of Materials Science and Engineering and Bredesen Center
Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center

Publication Date:: 2017-12-08

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear Science and Security Consortium

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation

OSTI Identifier:: 1477492

Alternate Identifier(s):: OSTI ID: 1576615

Grant/Contract Number:: NA0003180; NA-0003180

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Crystal Growth

Additional Journal Information:: Journal Volume: 483; Journal Issue: C; Journal ID: ISSN 0022-0248

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; A1. Characterization; A2. Bridgman technique; A2. Growth from melt; B1. Halides; B1. Rare earth compounds; B3. Scintillators

Citation Formats


                    Rutstrom, Daniel, Collette, Robyn, Stand, Luis, Loyd, Matthew, Wu, Yuntao, Koschan, Merry, Melcher, Charles L., and Zhuravleva, Mariya. Investigating new activators for small-bandgap LaX3 (X = Br, I) scintillators.  United States: N. p., 2017. 
Web.  doi:10.1016/j.jcrysgro.2017.12.015.

Copy to clipboard


                    Rutstrom, Daniel, Collette, Robyn, Stand, Luis, Loyd, Matthew, Wu, Yuntao, Koschan, Merry, Melcher, Charles L., & Zhuravleva, Mariya. Investigating new activators for small-bandgap LaX3 (X = Br, I) scintillators.  United States.  https://doi.org/10.1016/j.jcrysgro.2017.12.015

Copy to clipboard


                    Rutstrom, Daniel, Collette, Robyn, Stand, Luis, Loyd, Matthew, Wu, Yuntao, Koschan, Merry, Melcher, Charles L., and Zhuravleva, Mariya. Fri .  
"Investigating new activators for small-bandgap LaX3 (X = Br, I) scintillators".  United States.  https://doi.org/10.1016/j.jcrysgro.2017.12.015.  https://www.osti.gov/servlets/purl/1477492.

Copy to clipboard


                    
@article{osti_1477492,

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

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

  abstractNote = {In this study, 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. Finally, 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.},

  doi          = {10.1016/j.jcrysgro.2017.12.015},

  journal      = {Journal of Crystal Growth},

  number       = C,

  volume       = 483,

  place        = {United States},

  year         = {2017},

  month        = {12}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (Publisher)

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1016/j.jcrysgro.2017.12.015

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 1 work

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Crystal growth and scintillation properties of pure and Tl-doped Cs₃Cu₂I₅

Journal Article Stand, Luis ; Rutstrom, Daniel ; Koschan, Merry ; ... - Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

Here, the Bridgman crystal growth and scintillation properties of both undoped and Tl-doped Cs₃Cu₂I₅ are presented. This material is very attractive for gamma and X-ray detection applications, with a density of 4.53 g/cm³ and effective atomic number of 51.9. Undoped Cs₃Cu₂I₅ had a light yield of 41,500 photons/MeV, with an energy resolution of 4.4% at 662 keV. Thallium doping at 0.5 mol % resulted in a much-improved scintillation response, in which light yield increased to 98,200 photons/MeV and energy resolution reduced to 3.3% at 662 keV. The X-ray excited emission is centered at 442 nm for the undoped and 500more »« less
https://doi.org/10.1016/j.nima.2020.164963

Full Text Available
TlSr₂I₅:Eu₂₊- A new high density scintillator for gamma-ray detection

Journal Article Soundara Pandian, Lakshmi ; Loyd, Matthew ; Du, Mao-Hua ; ... - Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

In this paper we report on the scintillation properties of TlSr₂I₅ doped with Eu²⁺, a novel thallium-containing high-resolution scintillator for gamma-ray spectroscopy. Here, small diameter, good quality crystals of TlSr₂I₅:Eu (TSI) with different Eu²⁺ concentrations were grown by the vertical Bridgman method. X-ray diffraction measurements show that single crystals of TSI belong to the monoclinic system with space group P2₁/c. TlSr₂I₅ has a density of 5.32 g/cm³ and effective Z of 60. The X-ray excited emission of Eu²⁺ doped TlSr₂I₅ features a broad emission band peaking between 460–470 nm. The light yield of TlSr₂I₅ crystal doped with 1% Eu²⁺ ismore »« less
https://doi.org/10.1016/j.nima.2020.164876

Full Text Available
Crystal growth and scintillation properties of new ytterbium-activated scintillators Cs₄CaI₆:Yb and Cs₄SrI₆:Yb

Journal Article Rutstrom, Daniel ; Stand, Luis ; Dryzhakov, Bogdan ; ... - Optical Materials

Yb²⁺ was investigated as a potential alternative activator for Cs₄SrI₆ and Cs₄CaI₆ scintillators for the first time, as opposed to the previously studied Eu2+ activator. Single crystals with nominal Yb²⁺ concentrations of 0.5 mol%, 1 mol%, and 3 mol% were grown in Ø7 mm ampoules using the vertical Bridgman method. Luminescence and scintillation properties were evaluated as a function of Yb²⁺ concentration and host compound. Here, the 5d → 4f electronic transition of Yb²⁺ was observed for both the Sr- and Ca-containing compositions. X-ray induced radioluminescence emission was centered between 449 nm and 463 nm depending on Yb²⁺ concentration andmore »« less
https://doi.org/10.1016/j.optmat.2020.110536

Full Text Available
Crystal growth and characterization of high performance KSr₂Br_xI_5-x:Eu scintillators

Journal Article Stand, L. ; Zhuravleva, M. ; Johnson, J. ; ... - Journal of Crystal Growth

In this work we investigated the effects of replacing some of the matrix iodine atoms in KSr₂I₅:Eu with bromine, forming new solid solutions of KSr₂Br_xI_(5-x):Eu (where 0.05 ≤ x ≤ 1). Transparent 15 and 22mm diameter single crystals of KSr₂Br_xI_(5-x):Eu were grown via the vertical Bridgman technique using a two-zone transparent furnace. The scintillation properties of the mixed compounds were investigated and compared to the non-mixed parent compound, KSr₂I₅:Eu. The addition of bromine blue-shifted the x-ray excited emission from 450 to 446 nm, increased the light yield by ~11% and decreased the scintillation decay time by suppressing its secondary componentmore »« less
Cited by 6
https://doi.org/10.1016/j.jcrysgro.2019.125213

Full Text Available
Gamma-ray spectroscopic characterization of long, rapidly-grown KSr₂I₅:Eu crystals

Journal Article Stand, L. ; Zhuravleva, M. ; Johnson, J. ; ... - Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

Collimation and volumetric studies were done to evaluate the gamma-ray spectroscopic performance of KSr₂I₅:Eu scintillators grown via the vertical Bridgman method. To demonstrate practical crystal growth for large-scale production, Ø1 in. × 6 in. long crystals were grown using fast pulling rates up to 5 mm/h and short cooling times. The long crystals were sectioned into shorter Ø1 in. cylinders to investigate sample-to-sample variation of scintillation properties, the effects of self-absorption and scintillation non-uniformity using different gamma-ray excitation configurations. The best light output and energy resolution achieved for the largest volume and aspect ratio crystals (60 cm³ Ø1 in xmore »« less
Cited by 1
https://doi.org/10.1016/j.nima.2020.163700

Full Text Available

Similar Records

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

Abstract

Citation Formats

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