Characterization and optimization of a CLLBC detector

T. C. Borgwardt; S. Alcorn; I. Garishvili

doi:10.1016/j.nima.2026.171605

Characterization and optimization of a CLLBC detector

T. C. Borgwardt
, S. Alcorn
, I. Garishvili

Advanced Detection and Applied Data Scie

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

1 Scopus citations

Abstract

CLLBC is an inorganic detector material of interest for several application spaces, including non-proliferation. The multi-modal aspect of CLLBC, sensitive to gamma-rays, thermal neutrons, and fast neutrons, makes it particularly interesting for Arms Control. To explore the utility of CLLBC for Arms Control, a detector needs to be characterized and optimized to test its performance in relevant scenarios. In addition, validation through simulation is vital for exploring specific use cases for the detector. In this work, a detector with ⌀ 38 mm ×38 mm cylinder CLLBC crystal is used to study pulse shape discrimination of thermal neutrons and gamma-rays, as well as the timing and resolution of the gamma-ray signal for most optimized performance. Additionally, the intrinsic detection efficiency to gamma-rays is characterized through multiple experimental measurements and a high fidelity MCNP model of this detector that was developed and validated against several gamma-ray sources. The characterization of the fast neutrons will be presented in a future article.

Original language	English
Article number	171605
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1089
DOIs	https://doi.org/10.1016/j.nima.2026.171605
State	Published - Sep 2026

Funding

This work was supported by the US Department of Energy through the Los Alamos National Laboratory . Los Alamos National Laboratory is operated by Triad National Security, LLC, for the National Nuclear Security Administration of U.S. Department of Energy (Contract No. 89233218CNA000001 ). This work was supported by the U.S. Department of Energy, National Nuclear Security Administration, Office of Defense Nuclear Nonproliferation Research and Development .

Keywords

CLLBC
Gamma spectroscopy
Inorganic scintillator
Pulse shape discrimination

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10.1016/j.nima.2026.171605

Cite this

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title = "Characterization and optimization of a CLLBC detector",

abstract = "CLLBC is an inorganic detector material of interest for several application spaces, including non-proliferation. The multi-modal aspect of CLLBC, sensitive to gamma-rays, thermal neutrons, and fast neutrons, makes it particularly interesting for Arms Control. To explore the utility of CLLBC for Arms Control, a detector needs to be characterized and optimized to test its performance in relevant scenarios. In addition, validation through simulation is vital for exploring specific use cases for the detector. In this work, a detector with ⌀ 38 mm ×38 mm cylinder CLLBC crystal is used to study pulse shape discrimination of thermal neutrons and gamma-rays, as well as the timing and resolution of the gamma-ray signal for most optimized performance. Additionally, the intrinsic detection efficiency to gamma-rays is characterized through multiple experimental measurements and a high fidelity MCNP model of this detector that was developed and validated against several gamma-ray sources. The characterization of the fast neutrons will be presented in a future article.",

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AU - Alcorn, S.

AU - Garishvili, I.

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N2 - CLLBC is an inorganic detector material of interest for several application spaces, including non-proliferation. The multi-modal aspect of CLLBC, sensitive to gamma-rays, thermal neutrons, and fast neutrons, makes it particularly interesting for Arms Control. To explore the utility of CLLBC for Arms Control, a detector needs to be characterized and optimized to test its performance in relevant scenarios. In addition, validation through simulation is vital for exploring specific use cases for the detector. In this work, a detector with ⌀ 38 mm ×38 mm cylinder CLLBC crystal is used to study pulse shape discrimination of thermal neutrons and gamma-rays, as well as the timing and resolution of the gamma-ray signal for most optimized performance. Additionally, the intrinsic detection efficiency to gamma-rays is characterized through multiple experimental measurements and a high fidelity MCNP model of this detector that was developed and validated against several gamma-ray sources. The characterization of the fast neutrons will be presented in a future article.

AB - CLLBC is an inorganic detector material of interest for several application spaces, including non-proliferation. The multi-modal aspect of CLLBC, sensitive to gamma-rays, thermal neutrons, and fast neutrons, makes it particularly interesting for Arms Control. To explore the utility of CLLBC for Arms Control, a detector needs to be characterized and optimized to test its performance in relevant scenarios. In addition, validation through simulation is vital for exploring specific use cases for the detector. In this work, a detector with ⌀ 38 mm ×38 mm cylinder CLLBC crystal is used to study pulse shape discrimination of thermal neutrons and gamma-rays, as well as the timing and resolution of the gamma-ray signal for most optimized performance. Additionally, the intrinsic detection efficiency to gamma-rays is characterized through multiple experimental measurements and a high fidelity MCNP model of this detector that was developed and validated against several gamma-ray sources. The characterization of the fast neutrons will be presented in a future article.

KW - CLLBC

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KW - Inorganic scintillator

KW - Pulse shape discrimination

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M1 - 171605

ER -

Characterization and optimization of a CLLBC detector

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Keywords

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