Crystal growth and scintillation properties of Ce3+-doped KGd2Cl7

Zhuravleva, Mariya; Yang, Kan; Green, A.; Melcher, Charles L.

doi:10.1016/j.jcrysgro.2010.10.206

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…Complex metal halides with divalent and trivalent substitutional sites in the crystal lattices for the Ce 3+ or Eu 2+ doping are of particular interest. Several promising scintillators in compositional families such as ARE 2 X 7 :Ce, A 3 REX 6 :Ce, AM 2 X 5 :Eu, AMX 3 , A 3 MX 5 :Eu (A = Cs, K, Na; M = Ca, Sr, Ba; RE = Ce, Gd, Y, La; X = Cl, Br, I) have been discovered by our group as well as by others [2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 73%

High energy resolution scintillators for nuclear nonproliferation applications

et al. 2014

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The detection of ionizing radiation is important in numerous applications related to national security ranging from the detection and identification of fissile materials to the imaging of cargo containers. A key performance criterion is the ability to reliably identify the specific gamma-ray signatures of radioactive elements, and energy resolution approaching 2% at 662 keV is required for this task. In this work, we present discovery and development of new high energy resolution scintillators for gamma-ray detection. The new ternary halide scintillators belong to the following compositional families: AM 2 X 5 :Eu, AMX 3 , and A 2 MX 4 :Eu (A = Cs, K; M = Ca, Sr, Ba; X = Br, I) as well as mixed elpasolites Cs 2 NaREBr 3 I 3 :Ce (RE = La, Y). Using thermal analysis, we confirmed their congruent melting and determined crystallization and melting points. Using the Bridgman technique, we grew 6, 12 and 22 mm diameter single crystals and optimized the Eu concentration to obtain the best scintillation performance. Pulse-height spectra under gamma-ray excitation were recorded in order to measure scintillation light output, energy resolution and light output nonproportionality. The KSr 2 I 5 :Eu 4% showed the best combination of excellent crystal quality obtained at fast pulling rates and high light output of ~95,000 photons/MeV with energy resolution of 2.4% at 662 keV.

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Section: Introductionmentioning

confidence: 73%

High energy resolution scintillators for nuclear nonproliferation applications

et al. 2014

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“…[123] Initially, this technique was used for crystal growth of semiconductors and many publications were devoted to CdTe applying both the vertical [124] and horizontal [125] arrangements. On the contrary, the reports on the vertical gradient freeze (VGF) growth of halide crystals were limited to few publications regarding preparation of KGd 2 Cl 7 :Ce, [126] Cs 3 EuI 5 , [127] and CsI:Tl. [128] The skull method is another technique belonging to the directional solidification ones developed in 1960s.…”

Section: Bulk Crystal Growth Of Halide Materialsmentioning

confidence: 99%

“…However, recently the crystal structure of CsCe 2 Cl 7 was derived from single-crystal diffraction having a new, previously unreported, monoclinic crystal structure. [207] Most of the reported crystals from the ALn 2 X 7 family have low quality due to complicated crystal growth [126,[208][209][210] which results in worse scintillation performance. However, gadolinium-containing crystals were suggested as scintillators for both gamma and thermal neutron detection.…”

Section: A 2 Lnxmentioning

confidence: 99%

Advanced Halide Scintillators: From the Bulk to Nano

Vaněček

Děcká

Mihóková

et al. 2022

Advanced Photonics Research

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Halide scintillators have been playing a crucial role in the detection of ionizing radiation since the discovery of scintillation in NaI:Tl in 1948. The discovery of NaI:Tl motivated the research and development (R&D) of halide scintillators, resulting in the development of CsI:Tl, CsI:Na, CaF2:Eu, etc. Later, the R&D shifted toward oxide materials due to their high mechanical and chemical stability, good scintillation properties, and relative ease of bulk single‐crystal growth. However, the development in crystal growth technology allows for the growth of high‐quality single crystals of hygroscopic and mechanically fragile materials including SrI2 and LaBr3. Scintillators based on these materials exhibit excellent performance and push the limits of inorganic scintillators. These results motivate intense research of a large variety of halide‐based scintillators. Moreover, materials based on lead halide perovskites find applications in the fields of photovoltaics, solid‐state lighting, and lasers. The first studies show also the significant potential of lead halide perovskites as ultrafast scintillators in the form of nanocrystals. The purpose of this review is to summarize the R&D in the field of halide scintillators during the last decade and highlight perspectives for future development.

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Inorganic Halide Scintillators

Fujimoto

2022

Phosphors for Radiation Detectors

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Crystal growth and scintillation properties of Ce3+-doped KGd2Cl7

Cited by 7 publications

References 12 publications

High energy resolution scintillators for nuclear nonproliferation applications

High energy resolution scintillators for nuclear nonproliferation applications

Advanced Halide Scintillators: From the Bulk to Nano

Inorganic Halide Scintillators

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