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Title: Investigating new activators for small-bandgap LaX 3 (X = Br, I) scintillators

Abstract

In this study, luminescence and scintillation properties of Bi 3+, Sb 3+, and Eu 2+-doped LaI 3 and LaBr 3 were explored. Out of the three dopants investigated, Eu 2+ was the most promising new activator for small-bandgap LaX 3 (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. LaBr 3:Eu 2+ 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:Eu 2+ worsened for most samples as iodide concentration was increased. Finally, room-temperature scintillation of LaI 3:Eu 2+ 0.1% and 0.5% was observed and is the first case of room-temperature emission reported for doped LaI 3.

Authors:
 [1];  [2];  [3];  [1];  [1];  [4];  [3];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center and Department of Materials Science and Engineering
  2. Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering
  3. Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center, Department of Materials Science and Engineering and Bredesen Center
  4. Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center
Publication Date:
Research Org.:
Nuclear Science and Security Consortium, Berkeley, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
OSTI Identifier:
1477492
Grant/Contract Number:  
NA0003180
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.
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. doi:10.1016/j.jcrysgro.2017.12.015.
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. doi:10.1016/j.jcrysgro.2017.12.015. https://www.osti.gov/servlets/purl/1477492.
@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}
}

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