CLLBC High Temperature Scintillation Characterization and Detector Integration

Nathaniel Kaneshige; Lakshmi Soundara Pandian; Kyle Werra; Josh Tower; Jarek Glodo; Erik Johnson; Michael P. Dion; Irakli Garishvili; Greg Westphal; Louise G. Worrall; Michael R. Squillante; Kanai Shah

doi:10.1109/TNS.2023.3262107

CLLBC High Temperature Scintillation Characterization and Detector Integration

Nathaniel Kaneshige
, Lakshmi Soundara Pandian
, Kyle Werra
, Josh Tower
, Jarek Glodo
, Erik Johnson
, Michael P. Dion
, Irakli Garishvili
, Greg Westphal
, Louise G. Worrall
, Michael R. Squillante
, Kanai Shah

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

2 Scopus citations

Abstract

High-temperature detectors are required for nuclear material accounting measurements for some advanced reactor designs including molten salt reactors. The Cs2LiLa (Br,Cl)6:Ce (CLLBC) scintillator is a dual-mode scintillator that shows excellent gamma detection along with the capability to discriminate gamma rays from neutrons and is available as a commercial product from Radiation Monitoring Devices Inc. (RMD). The energy resolution at room temperature (RT) is 3.0% at 662 keV with a light yield of 45 000 ph/MeV. The gamma-neutron pulse shape discrimination (PSD) figure of merit (FOM) is 3.5 at RT. We investigated the gamma and neutron detection performance of CLLBC scintillators from 25 °C to 200 °C. The results showed a good light yield response for gamma events as a function of temperature while the light yield for neutron-capture events monotonically decreased from 100% to 76% at 200 °C. When integrated with a high-temperature photomultiplier, at 175 °C we obtained energy resolutions of 7.8% for 662 keV gammas and 4.2% for neutron-capture events, together with a PSD FOM of 0.74.

Original language	English
Pages (from-to)	1357-1361
Number of pages	5
Journal	IEEE Transactions on Nuclear Science
Volume	70
Issue number	7
DOIs	https://doi.org/10.1109/TNS.2023.3262107
State	Published - Jul 1 2023

Funding

This work was supported by the U.S. Department of Energy under Contract DE SC0020950.

Keywords

Cs'LiLa(Br-Cl)':Ce (CLLBC)
elpasolite
high temperature
neutron detection
nuclear accounting
scintillator

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10.1109/TNS.2023.3262107

Cite this

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title = "CLLBC High Temperature Scintillation Characterization and Detector Integration",

abstract = "High-temperature detectors are required for nuclear material accounting measurements for some advanced reactor designs including molten salt reactors. The Cs2LiLa (Br,Cl)6:Ce (CLLBC) scintillator is a dual-mode scintillator that shows excellent gamma detection along with the capability to discriminate gamma rays from neutrons and is available as a commercial product from Radiation Monitoring Devices Inc. (RMD). The energy resolution at room temperature (RT) is 3.0\% at 662 keV with a light yield of 45 000 ph/MeV. The gamma-neutron pulse shape discrimination (PSD) figure of merit (FOM) is 3.5 at RT. We investigated the gamma and neutron detection performance of CLLBC scintillators from 25 °C to 200 °C. The results showed a good light yield response for gamma events as a function of temperature while the light yield for neutron-capture events monotonically decreased from 100\% to 76\% at 200 °C. When integrated with a high-temperature photomultiplier, at 175 °C we obtained energy resolutions of 7.8\% for 662 keV gammas and 4.2\% for neutron-capture events, together with a PSD FOM of 0.74.",

keywords = "Cs'LiLa(Br-Cl)':Ce (CLLBC), elpasolite, high temperature, neutron detection, nuclear accounting, scintillator",

author = "Nathaniel Kaneshige and Pandian, \{Lakshmi Soundara\} and Kyle Werra and Josh Tower and Jarek Glodo and Erik Johnson and Dion, \{Michael P.\} and Irakli Garishvili and Greg Westphal and Worrall, \{Louise G.\} and Squillante, \{Michael R.\} and Kanai Shah",

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doi = "10.1109/TNS.2023.3262107",

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T1 - CLLBC High Temperature Scintillation Characterization and Detector Integration

AU - Kaneshige, Nathaniel

AU - Pandian, Lakshmi Soundara

AU - Werra, Kyle

AU - Tower, Josh

AU - Glodo, Jarek

AU - Johnson, Erik

AU - Dion, Michael P.

AU - Garishvili, Irakli

AU - Westphal, Greg

AU - Worrall, Louise G.

AU - Squillante, Michael R.

AU - Shah, Kanai

PY - 2023/7/1

Y1 - 2023/7/1

N2 - High-temperature detectors are required for nuclear material accounting measurements for some advanced reactor designs including molten salt reactors. The Cs2LiLa (Br,Cl)6:Ce (CLLBC) scintillator is a dual-mode scintillator that shows excellent gamma detection along with the capability to discriminate gamma rays from neutrons and is available as a commercial product from Radiation Monitoring Devices Inc. (RMD). The energy resolution at room temperature (RT) is 3.0% at 662 keV with a light yield of 45 000 ph/MeV. The gamma-neutron pulse shape discrimination (PSD) figure of merit (FOM) is 3.5 at RT. We investigated the gamma and neutron detection performance of CLLBC scintillators from 25 °C to 200 °C. The results showed a good light yield response for gamma events as a function of temperature while the light yield for neutron-capture events monotonically decreased from 100% to 76% at 200 °C. When integrated with a high-temperature photomultiplier, at 175 °C we obtained energy resolutions of 7.8% for 662 keV gammas and 4.2% for neutron-capture events, together with a PSD FOM of 0.74.

AB - High-temperature detectors are required for nuclear material accounting measurements for some advanced reactor designs including molten salt reactors. The Cs2LiLa (Br,Cl)6:Ce (CLLBC) scintillator is a dual-mode scintillator that shows excellent gamma detection along with the capability to discriminate gamma rays from neutrons and is available as a commercial product from Radiation Monitoring Devices Inc. (RMD). The energy resolution at room temperature (RT) is 3.0% at 662 keV with a light yield of 45 000 ph/MeV. The gamma-neutron pulse shape discrimination (PSD) figure of merit (FOM) is 3.5 at RT. We investigated the gamma and neutron detection performance of CLLBC scintillators from 25 °C to 200 °C. The results showed a good light yield response for gamma events as a function of temperature while the light yield for neutron-capture events monotonically decreased from 100% to 76% at 200 °C. When integrated with a high-temperature photomultiplier, at 175 °C we obtained energy resolutions of 7.8% for 662 keV gammas and 4.2% for neutron-capture events, together with a PSD FOM of 0.74.

KW - Cs'LiLa(Br-Cl)':Ce (CLLBC)

KW - elpasolite

KW - high temperature

KW - neutron detection

KW - nuclear accounting

KW - scintillator

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JO - IEEE Transactions on Nuclear Science

JF - IEEE Transactions on Nuclear Science

IS - 7

ER -

CLLBC High Temperature Scintillation Characterization and Detector Integration

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