Pulse shape analysis of LiI:Tl crystal scintillators

Nguyen Thanh Luan; Phan Quoc Vuong; Nguyen Duc Ton; H. J. Kim

doi:10.1016/j.optmat.2023.113874

Pulse shape analysis of LiI:Tl crystal scintillators

Nguyen Thanh Luan, Phan Quoc Vuong, Nguyen Duc Ton, H. J. Kim

Kyungpook National University

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

1 Scopus citations

Abstract

The LiI:Tl crystal is a candidate for thermal neutron measurements and rare event searches due to the advantage of the lithium and iodide isotopes in its composition. This study shows the pulse shape discrimination (PSD) capability of thermal neutron irradiation. Particle discrimination is essential for improving neutron measurement and rare event searches to reduce unwanted backgrounds. To investigate the pulse-shape characteristics of LiI:Tl crystals with different radiations, digital analysis of pulse shape has been considered. The raw pulses were fitted with a suitable pulse form. The fitted pulses were studied in both the time and frequency domains which improve the Figure-of-Merit over the charge comparison methods. Our results show the change of PSD for LiI:Tl crystals with different Thallium concentrations. The surface effect is discussed, and other related scintillation characteristics were also studied.

Original language	English
Article number	113874
Journal	Optical Materials
Volume	140
DOIs	https://doi.org/10.1016/j.optmat.2023.113874
State	Published - Jun 2023

Keywords

Decay time
Digital analysis
LiI:Tl scintillator
Non-proportionality
Pusle shape discrimination
Thermal neutron

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10.1016/j.optmat.2023.113874

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title = "Pulse shape analysis of LiI:Tl crystal scintillators",

abstract = "The LiI:Tl crystal is a candidate for thermal neutron measurements and rare event searches due to the advantage of the lithium and iodide isotopes in its composition. This study shows the pulse shape discrimination (PSD) capability of thermal neutron irradiation. Particle discrimination is essential for improving neutron measurement and rare event searches to reduce unwanted backgrounds. To investigate the pulse-shape characteristics of LiI:Tl crystals with different radiations, digital analysis of pulse shape has been considered. The raw pulses were fitted with a suitable pulse form. The fitted pulses were studied in both the time and frequency domains which improve the Figure-of-Merit over the charge comparison methods. Our results show the change of PSD for LiI:Tl crystals with different Thallium concentrations. The surface effect is discussed, and other related scintillation characteristics were also studied.",

keywords = "Decay time, Digital analysis, LiI:Tl scintillator, Non-proportionality, Pusle shape discrimination, Thermal neutron",

author = "Luan, {Nguyen Thanh} and Vuong, {Phan Quoc} and Ton, {Nguyen Duc} and Kim, {H. J.}",

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doi = "10.1016/j.optmat.2023.113874",

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T1 - Pulse shape analysis of LiI:Tl crystal scintillators

AU - Luan, Nguyen Thanh

AU - Vuong, Phan Quoc

AU - Ton, Nguyen Duc

AU - Kim, H. J.

PY - 2023/6

Y1 - 2023/6

N2 - The LiI:Tl crystal is a candidate for thermal neutron measurements and rare event searches due to the advantage of the lithium and iodide isotopes in its composition. This study shows the pulse shape discrimination (PSD) capability of thermal neutron irradiation. Particle discrimination is essential for improving neutron measurement and rare event searches to reduce unwanted backgrounds. To investigate the pulse-shape characteristics of LiI:Tl crystals with different radiations, digital analysis of pulse shape has been considered. The raw pulses were fitted with a suitable pulse form. The fitted pulses were studied in both the time and frequency domains which improve the Figure-of-Merit over the charge comparison methods. Our results show the change of PSD for LiI:Tl crystals with different Thallium concentrations. The surface effect is discussed, and other related scintillation characteristics were also studied.

AB - The LiI:Tl crystal is a candidate for thermal neutron measurements and rare event searches due to the advantage of the lithium and iodide isotopes in its composition. This study shows the pulse shape discrimination (PSD) capability of thermal neutron irradiation. Particle discrimination is essential for improving neutron measurement and rare event searches to reduce unwanted backgrounds. To investigate the pulse-shape characteristics of LiI:Tl crystals with different radiations, digital analysis of pulse shape has been considered. The raw pulses were fitted with a suitable pulse form. The fitted pulses were studied in both the time and frequency domains which improve the Figure-of-Merit over the charge comparison methods. Our results show the change of PSD for LiI:Tl crystals with different Thallium concentrations. The surface effect is discussed, and other related scintillation characteristics were also studied.

KW - Decay time

KW - Digital analysis

KW - LiI:Tl scintillator

KW - Non-proportionality

KW - Pusle shape discrimination

KW - Thermal neutron

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VL - 140

JO - Optical Materials

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Pulse shape analysis of LiI:Tl crystal scintillators

Abstract

Keywords

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