Latest advances in large diameter SrI:Eu and CLYC:Ce scintillators for isotope identification

Hawrami, R.; Hines, C. R.; Abselem, I.; Biteman, V. B.; Vaghini, J.; Głodo, J.; O’Dougherty, P.; Shah, K.S.; Cherepy, Nerine J.; Payne, Stephen A.; Bürger, A.; Boatner, L. A.

doi:10.1117/12.945937

Cited by 8 publications

(7 citation statements)

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“…Scintillators play an important role in radiation detection and imaging, more so in recent times with newly developed metal halides such as LaBr 3 :Ce 1 and SrI 2 :Eu. 2 Dual mode elpasolite crystals have also been intensively investigated in recent studies. 6 Li enriched Cs 2 LiYCl 6 :Ce (CLYC) and Cs 2 LiLa(Cl,Br) 6 :Ce (CLLBC) elpasolite single crystals are proposed as promising neutron/gamma dual mode scintillators.…”

Section: Introductionmentioning

confidence: 99%

“…CLYC is reported of having a light yield of 20,000 ph/MeV with a 3.6% energy resolution at 662 keV, and its gamma equivalent energy (GEE) is 3.2 MeV. 2 While CLYC is an excellent scintillator, its drawbacks are its low density and stopping power, which are comparable to NaI:Tl. In order to improve these parameters, replacement of Cs ions with isovalent Tl ions was investigated.…”

Section: Introductionmentioning

confidence: 99%

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Tl₂LiYCl₆: Large Diameter, High Performing Dual Mode Scintillator

Hawrami

Ariesanti

Wei

et al. 2017

Crystal Growth & Design

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Tl2LiYCl6:Ce (TLYC) is a recently discovered dual mode gamma-ray and neutron scintillator. So far small crystals of this composition have been studied, but for practical applications with affordable price, large-scale crystals are required. In this work, we present successful efforts to grow crack-free single crystals with sizes up to ⌀1″ × 5.5″. A variety of experimental techniques were employed to investigate the scintillation properties. A ⌀1″ × 1.2″ TLYC cylinder has a light yield of 25,000 ph/MeV, and its energy resolution is better than 4% at 662 keV. The gamma equivalent energy (GEE) produced by thermal neutron is 1.89 MeVee, along with a neutron induced light yield of 47,000 ph/n. Pulse shape discrimination (PSD) between gamma-rays and neutrons has been successfully shown with a current Figure-of-Merit (FOM) of 2.4. This article explores the crystal growth, scintillation properties, and potential applications of TLYC.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tl₂LiYCl₆: Large Diameter, High Performing Dual Mode Scintillator

Hawrami

Ariesanti

Wei

et al. 2017

Crystal Growth & Design

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“…The initially reported energy resolution of CLYC:Ce 3+ crystals is 7.3% at 662 keV of 137 Cs radiation, as shown in Figure 4. Benefiting from the improvement in vertical Bridgman technology and purification method, the energy resolution of one inch CLYC:Ce 3+ crystal has been elevated to 3.6% at 662 keV in 2012 [12]. It is worth noting that the energy resolution value of CLYC:Ce 3+ outperforms many commercial NaI:Tl products, which stems from exceptionally good energy proportionality.…”

Section: Cs 2 Liycl 6 (Clyc)mentioning

confidence: 99%

“…The elpasolites materials as a new generation of halide scintillators have achieved high light output and excellent proportionality, and more outstanding scintillators are exploited from the elpasolite crystal family. Benefiting from the high proportionality, the excellent energy resolution of 3.6% at 662 keV was achieved in the Cs 2 LiYCl 6 crystal [12]. Cs 2 LiLaBr 6 has been found to be the brightest elpasolite scintillator, and it achieves 60,000 photons/MeV light yield and 2.9% energy resolution at 662 KeV [13].…”

Section: Introductionmentioning

confidence: 99%

Recent Trends in Elpasolite Single Crystal Scintillators for Radiation Detection

et al. 2022

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Scintillation detection has attracted great interest in nuclear medicine, nuclear radiation detection, high-energy physics, and non-destructive inspection. The elpasolite crystals with Ce3+ dopants are promising for these endeavors due to their modest light yield and extremely good proportionality when excited by the gamma ray. Moreover, the 6Li and 35Cl isotopes in elpasolite crystals endow them with excellent neutron detection capability. These features allow not only a high energy resolution but also a high detection sensitivity. The elpasolite scintillators also enable the precisely dual detection of gamma/neutron signals through pulse height discrimination (PHD) or pulse shape discrimination (PSD). In this work, we review recent investigations on using the typical elpasolite scintillators, including Ce3+-doped Cs2LiYCl6 (CLYC), Cs2LiLaCl6 (CLLC), and Cs2LiLaBr6 (CLLB), for the monitoring of gamma rays and neutrons. The scintillation properties, detection mechanism, and elpasolite crystal structure are also discussed with the aim of improving high-energy ray detection ability.

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“…无机材料学报第 32 卷最有应用前景的闪烁晶体。与传统的伽马射线探测材料相比, CLYC 晶体的光产额并非很高(约为 20000 p.e./MeV) [2] , 甚至少于 NaI(Tl)晶体(约为 38000 p.e./MeV) [3] , 但 CLYC 晶体在不同放射源的伽马射线激发下表现出良好的线性响应, Glodo 等 [4] 报道 CLYC 晶体在不同的伽马射线源 241 Am、 57 Co、 137 Cs、 22 Na 激发下(数据经归一化之后), 其光产额的非线性偏差是 2.4%, 低能量处的线性偏差达到 1.6%, 显著优于 NaI(Tl)晶体的非线性偏差(20%)。Higgins 等 [5] 报道的 CLYC 晶体光产额非线性偏差达到 1%。而 Hawrami 等 [6] 在 137 Cs 源 662 keV 伽马射线激发下测得 CLYC 晶体的能量分辨率达到 3.6%, 明显优于 NaI(Tl)((6%~7%)@662keV), 在伽马射线探测方面显示出应用潜力。 CLYC 借助于中子与 CLYC 中的 6 Li 和 35 Cl 元素间发生的核反应对中子实现间接探测。 6 Li 同位素与热中子之间的核反应 6 3 Li+ 10 n→ 3 1 H+α+4.8 MeV, 产生的带电粒子激发闪烁体内的发光中心而产生光信号。Hawrami 等 [6] [8] [9][10] 。271 nm 处的激发峰具有较宽的激发带, 对应于自陷激子(STE)激发 [11]…”

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Optical and Scintillation Properties of Cs$lt;inf$gt;2$lt;/inf$gt;LiYCl$lt;inf$gt;6$lt;/inf$gt;:Ce Crystal

Wang¹,

Jian²,

Li³

et al. 2017

Journal of Inorganic Materials

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Crystal structure of Cs 2 LiY 0.95 Cl 6 :5%Ce crystal (CYLC) grown by vertical Bridgement method from polycrystal raw materials was measured by X-ray diffraction (XRD) and was proved to have elpasolite structure. The detected structure of Cs 2 LiYCl 6 :Ce crystal was agreed well with theoretical structure. Six optical absorption bands which are suggested to originate from the transition of electron from 4f to 5d 1~5 of Ce ions and self-trapped excition (STE), can be identified in the absorption spectra of the CLYC:Ce crystal. X-ray and ultraviolet excited luminescence spectra of Cs 2 LiY 0.95 Cl 6 :5%Ce crystal present an emission band from 350 nm to 450 nm corresponding to 5d-4f transitions of Ce 3+ ions. The peaks locating at 300 nm and 321 nm can be ascribed to core to valence luminescence and STE luminescence. Under the excitation of -rays from 137 Cs, Cs 2 LiY 0.95 Cl 6 :5%Ce crystal presents energy resolution of 8.1%, and scintillation decay time of 58 ns and 580 ns. All of these properties show that Cs 2 LiYCl 6 :Ce crystal is a promising scintillator for neutron and gamma detection applications.

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Latest advances in large diameter SrI:Eu and CLYC:Ce scintillators for isotope identification

Cited by 8 publications

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Tl₂LiYCl₆: Large Diameter, High Performing Dual Mode Scintillator

Tl₂LiYCl₆: Large Diameter, High Performing Dual Mode Scintillator

Recent Trends in Elpasolite Single Crystal Scintillators for Radiation Detection

Optical and Scintillation Properties of Cs$lt;inf$gt;2$lt;/inf$gt;LiYCl$lt;inf$gt;6$lt;/inf$gt;:Ce Crystal

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Latest advances in large diameter SrI:Eu and CLYC:Ce scintillators for isotope identification

Cited by 8 publications

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Tl2LiYCl6: Large Diameter, High Performing Dual Mode Scintillator

Tl2LiYCl6: Large Diameter, High Performing Dual Mode Scintillator

Recent Trends in Elpasolite Single Crystal Scintillators for Radiation Detection

Optical and Scintillation Properties of Cs$lt;inf$gt;2$lt;/inf$gt;LiYCl$lt;inf$gt;6$lt;/inf$gt;:Ce Crystal

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Tl₂LiYCl₆: Large Diameter, High Performing Dual Mode Scintillator

Tl₂LiYCl₆: Large Diameter, High Performing Dual Mode Scintillator