Modelling of the thermodynamic properties of the ABr–CeBr3 (A=Li–Cs ) systems

Kapała, Jan; Rutkowska, Iwona; Chojnacka, Ida; Gaune‐Escard, M.

doi:10.1016/j.calphad.2009.10.008

Cited by 12 publications

(5 citation statements)

References 23 publications

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“…(4)). Similar effect for NaBr has been observed in previous works [3,23]. In LnBr 3 -MBr (Ln ¼La…Lu, M¼Li…Cs) systems compound with stoichiometry 3:1 (M 3 LnX 6 ) usually exists and melts congruently.…”

Section: Systemsupporting

confidence: 79%

Calculation and optimization of LaBr3–MBr (Li–Cs) phase diagrams by CALPHAD method

Pilarek¹,

Salamon²,

Kapała³

2014

Calphad

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Section: Systemsupporting

confidence: 79%

Calculation and optimization of LaBr3–MBr (Li–Cs) phase diagrams by CALPHAD method

Pilarek¹,

Salamon²,

Kapała³

2014

Calphad

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“…[9][10][11] The CsCe 2 Cl 7 with a density of 3.6 g cm À3 can reach a gamma-ray excited light yield of 26 000 photons per MeV, but a 50% higher light yield is achieved in CsCe 2 Br 7 with a higher density of 4.0 g cm À3 . The phase diagrams of CsCe 2 Cl 7 12 and CsCe 2 Br 7 13,14 indicate that they both melt congruently. Recently, the crystal structure refinement revealed that CsCe 2 Cl 7 crystallizes in the monoclinic space group P112 1 /b.…”

Section: Introductionmentioning

confidence: 96%

Crystal structure, electronic structure, temperature-dependent optical and scintillation properties of CsCe₂Br₇

Shi

Chakoumakos

et al. 2015

J. Mater. Chem. C

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CsCe 2 Br 7 is a self-activated inorganic scintillator that shows promising performance, but the understanding of the important structure-property relationships is lacking. In this work, we conduct a comprehensive study on CsCe 2 Br 7 . The crystal structure of CsCe 2 Br 7 is refined using single crystal X-ray study for the first time. It crystallizes into the orthorhombic crystal system with Pmnb space group. Its electronic structure is revealed by density functional theory (DFT) calculations. Two cerium emission centers are identified and the energy barriers related to the thermal quenching to 4f ground states of Ce 3+ for these two Ce centers are evaluated. CsCe 2 Br 7 single crystal has better light yield and energy resolution than CsCe 2 Cl 7 , but with an additional slow decay component of 1.7 ms. The existence of a deep trap with a depth of 0.9 eV in CsCe 2 Cl 7 contributes to its higher afterglow level in comparison to that of CsCe 2 Br 7 . The most possible point defects in CsCe 2 Cl 7 and CsCe 2 Br 7 are proposed by considering the vapour pressure in the growth atmosphere upon melting point.ionic activators (in particular Bi 3+ , Ce 3+ and Eu 2+ ), is a constituent of the crystal, for example CaWO 4 and Self-activated single crystals of CsCe 2 X 7 (X = Cl, Br) were developed in 2010. 9-11 The CsCe 2 Cl 7 with a density of 3.6 g cm À3 can reach a gamma-ray excited light yield of 26 000 photons per MeV, but a 50% higher light yield is achieved in CsCe 2 Br 7 with a higher density of 4.0 g cm À3 . The phase diagrams of CsCe 2 Cl 7 12 and CsCe 2 Br 7 13,14 indicate that they both melt congruently. Recently, the crystal structure refinement revealed that CsCe 2 Cl 7 crystallizes in the monoclinic space group P112 1 /b. 15 However, despite the fact that the CsCe 2 Br 7 single crystal showed more promising scintillation properties, several fundamental questions, including structureproperty relationship, are still not understood: (i) the crystal structure and electronic structure; (ii) temperature dependent luminescent behaviors; (iii) the scintillation property comparisons between CsCe 2 Cl 7 and CsCe 2 Br 7 , including non-proportionality and afterglow; (iv) the trapping effect of point defects and their possible origins. All these questions lead us to carry out an in-depth study of CsCe 2 Br 7 . The paper is organized as follows. Firstly, the crystal

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“…24,25) Herein, we report the structure and scintillation properties of a LiBr/CeBr 3 eutectic fabricated by the vertical Bridgman (VB) method. 25) were grown with a composition of 6 LiBr:75 mol% and CeBr 3 :25 mol%, 26) using the VB method, in a quartz ampoule with an inner diameter of 4 mm. In unidirectional growth processes such as the VB method, the 6 LiBr and CeBr 3 phases in the melt are deposited on their own solid phases.…”

Section: Introductionmentioning

confidence: 99%

Growth and scintillation properties of LiBr/CeBr₃ eutectic scintillator for neutron detection

Yajima

Kamada

Takizawa

et al. 2022

Jpn. J. Appl. Phys.

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The 6LiBr/CeBr3 eutectic scintillator for thermal neutron detection has been developed due to achieving high 6Li concentration. The eutectics were grown by vertical Bridgman method. Molar ratio of 6Li in 6LiBr/CeBr3 eutectic is 35 %, which is higher than that of commercial neutron scintillators such Ce:LiCaAlF6 and Ce:Cs2LiYCl6. The grown eutectic had lamellar-type eutectic structure extending along the growth direction and optical transparency. The grown eutectics showed an emission peak at 360 and 380 nm ascribed to Ce3+ 4f-5d transition from CeBr3 scintillation phase. The measurements of scintillation performance of the 6LiBr/CeBr3 were performed using x-ray, gamma-ray and neutron irradiation to evaluate its potential as a neutron scintillator.

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Modelling of the thermodynamic properties of the ABr–CeBr3 (A=Li–Cs ) systems

Cited by 12 publications

References 23 publications

Calculation and optimization of LaBr3–MBr (Li–Cs) phase diagrams by CALPHAD method

Calculation and optimization of LaBr3–MBr (Li–Cs) phase diagrams by CALPHAD method

Crystal structure, electronic structure, temperature-dependent optical and scintillation properties of CsCe₂Br₇

Growth and scintillation properties of LiBr/CeBr₃ eutectic scintillator for neutron detection

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Modelling of the thermodynamic properties of the ABr–CeBr3 (A=Li–Cs ) systems

Cited by 12 publications

References 23 publications

Calculation and optimization of LaBr3–MBr (Li–Cs) phase diagrams by CALPHAD method

Calculation and optimization of LaBr3–MBr (Li–Cs) phase diagrams by CALPHAD method

Crystal structure, electronic structure, temperature-dependent optical and scintillation properties of CsCe2Br7

Growth and scintillation properties of LiBr/CeBr3 eutectic scintillator for neutron detection

Contact Info

Product

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About

Crystal structure, electronic structure, temperature-dependent optical and scintillation properties of CsCe₂Br₇

Growth and scintillation properties of LiBr/CeBr₃ eutectic scintillator for neutron detection