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Title: Europium concentration effects on the scintillation properties of Cs 4SrI 6:Eu and Cs 4CaI 6:Eu single crystals for use in gamma spectroscopy

Abstract

Recently discovered scintillators Cs 4SrI 6:Eu and Cs 4CaI 6:Eu have shown promising properties for gamma-ray detection in homeland security applications, with <4% energy resolution (at 662 keV) and light yields above 50,000 ph/MeV. However, a thorough investigation of the effects of europium concentration has not yet been conducted. In this work, Eu 2+ concentration was varied from 0.5 mol% to 9 mol%, and Ø7 mm single crystals were grown from the melt via the vertical Bridgman method. Scintillation performance was evaluated as a function of Eu 2+ concentration to determine the optimal amount. The observed trend was improved energy resolution and higher light yield with increasing Eu 2+ concentration up to 7 mol%. The best energy resolution achieved was 3.2% for Cs 4SrI 6:Eu 7% and 3.6% for Cs 4CaI 6:Eu 7%. Their respective light yields were 71,000 ph/MeV and 69,000 ph/MeV.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1561974
Alternate Identifier(s):
OSTI ID: 1562338
Grant/Contract Number:  
NA0003180
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Luminescence
Additional Journal Information:
Journal Volume: 216; Journal Issue: C; Journal ID: ISSN 0022-2313
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Scintillator; Alkali metal halides; Rare earth elements; Bridgman technique; Growth from melt; Single crystal

Citation Formats

Rutstrom, Daniel, Stand, Luis, Koschan, Merry, Melcher, Charles L., and Zhuravleva, Mariya. Europium concentration effects on the scintillation properties of Cs4SrI6:Eu and Cs4CaI6:Eu single crystals for use in gamma spectroscopy. United States: N. p., 2019. Web. doi:10.1016/j.jlumin.2019.116740.
Rutstrom, Daniel, Stand, Luis, Koschan, Merry, Melcher, Charles L., & Zhuravleva, Mariya. Europium concentration effects on the scintillation properties of Cs4SrI6:Eu and Cs4CaI6:Eu single crystals for use in gamma spectroscopy. United States. doi:10.1016/j.jlumin.2019.116740.
Rutstrom, Daniel, Stand, Luis, Koschan, Merry, Melcher, Charles L., and Zhuravleva, Mariya. Wed . "Europium concentration effects on the scintillation properties of Cs4SrI6:Eu and Cs4CaI6:Eu single crystals for use in gamma spectroscopy". United States. doi:10.1016/j.jlumin.2019.116740.
@article{osti_1561974,
title = {Europium concentration effects on the scintillation properties of Cs4SrI6:Eu and Cs4CaI6:Eu single crystals for use in gamma spectroscopy},
author = {Rutstrom, Daniel and Stand, Luis and Koschan, Merry and Melcher, Charles L. and Zhuravleva, Mariya},
abstractNote = {Recently discovered scintillators Cs4SrI6:Eu and Cs4CaI6:Eu have shown promising properties for gamma-ray detection in homeland security applications, with <4% energy resolution (at 662 keV) and light yields above 50,000 ph/MeV. However, a thorough investigation of the effects of europium concentration has not yet been conducted. In this work, Eu2+ concentration was varied from 0.5 mol% to 9 mol%, and Ø7 mm single crystals were grown from the melt via the vertical Bridgman method. Scintillation performance was evaluated as a function of Eu2+ concentration to determine the optimal amount. The observed trend was improved energy resolution and higher light yield with increasing Eu2+ concentration up to 7 mol%. The best energy resolution achieved was 3.2% for Cs4SrI6:Eu 7% and 3.6% for Cs4CaI6:Eu 7%. Their respective light yields were 71,000 ph/MeV and 69,000 ph/MeV.},
doi = {10.1016/j.jlumin.2019.116740},
journal = {Journal of Luminescence},
number = C,
volume = 216,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
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This content will become publicly available on September 11, 2020
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