Relationship between Ca2+ concentration and the properties of codoped Gd3Ga3Al2O12:Ce scintillators

Meng, Fanman; Koschan, Merry; Wu, Yuntao; Melcher, Charles L.

doi:10.1016/j.nima.2015.06.043

Cited by 20 publications

(8 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, light yield of Mg 2+ and Ca 2+ co‐doped GGAG:Ce decreases in comparison with Mg/Ca‐free counterparts . Nonetheless, improvement of timing characteristics was reported for all the material systems . Previous results achieved by Mg co‐doping of the Ce‐doped garnet scintillators are presented in Table 1 .…”

Section: Introductionmentioning

confidence: 91%

See 1 more Smart Citation

Garnet Scintillators of Superior Timing Characteristics: Material, Engineering by Liquid Phase Epitaxy

Průša

Kučera

Babin

et al. 2017

Advanced Optical Materials

View full text Add to dashboard Cite

Using liquid phase epitaxy, the Mg co-doped multicomponent garnet film scintillators of composition (Ce 0.01 Lu 0.27 Gd 0.74 ) 3-x Mg x (Ga 2.48 Al 2.46 )O 12 , x = 0-0.002 (0-700 at. ppm) are prepared. Following luminescence and scintillation characteristics and their dependence on Mg concentration are studied: photoluminescence emission and excitation spectra, radioluminescence spectra, photoluminescence and scintillation decay curves, light yield, energy resolution, and afterglow. At lower Mg concentration, the timing characteristics are slightly improved, while light yield and energy resolution are not negatively influenced. At higher Mg concentration, scintillation decay is significantly accelerated, although light yield is somewhat reduced. Afterglow values become extraordinarily low for a garnet scintillator, at least two times better than the best values published so far, which paves the way for their application in fast frame imaging applications. A mechanism of the improvement is shortly discussed.

show abstract

Section: Introductionmentioning

confidence: 91%

“…Improvement of light yield was reported for LuAG:Ce and YAG:Ce . However, light yield of Mg 2+ and Ca 2+ co‐doped GGAG:Ce decreases in comparison with Mg/Ca‐free counterparts . Nonetheless, improvement of timing characteristics was reported for all the material systems .…”

Section: Introductionmentioning

confidence: 93%

Garnet Scintillators of Superior Timing Characteristics: Material, Engineering by Liquid Phase Epitaxy

Průša

Kučera

Babin

et al. 2017

Advanced Optical Materials

View full text Add to dashboard Cite

show abstract

“…The energy-level diagram for Ce 3þ in GAGG has been already described in Ref. [43], where the band gap of 6.8 eV was used. Different band gap values are also reported in Ref.…”

Section: Excitation Transfer In Gagg:ce and Gagg:cemg Crystalsmentioning

confidence: 99%

Excitation Transfer Engineering in Ce‐Doped Oxide Crystalline Scintillators by Codoping with Alkali‐Earth Ions

Auffray

Augulis

Fedorov

et al. 2018

Physica Status Solidi (a)

Self Cite

View full text Add to dashboard Cite

Time‐resolved spectroscopic study of the photoluminescence response to femtosecond pulse excitation and free carrier absorption at different wavelengths, thermally stimulated luminescence measurements and investigation of differential absorption are applied to amend the available data on excitation transfer in GAGG:Ce scintillators, and an electronic energy‐level diagram in this single crystal is suggested to explain the influence of codoping with divalent Mg on luminescence kinetics and light yield. The conclusions are generalized by comparison of the influence of aliovalent doping in garnets (GAGG:Ce) and oxyorthosilicates (LSO:Ce and YSO:Ce). In both cases, the codoping facilitates the energy transfer to radiative Ce3+ centers, while the light yield is increased in the LYSO:Ce system but reduced in GAGG:Ce.

show abstract

“…Most often impurities for GAGG : Ce co-doping are selected to be calcium (Ca 2+ ) [10][11][12][13][14] and magnesium (Mg 2+ ) [10,[15][16][17]. Some research teams used lithium (Li + ) [18], boron (B 3+ ) [11,19] and barium (Ba 2+ ) [11] as co-doping impurities.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ca 2+ and Zr 4+ co-doping on the optical properties of Gd 3Al 2Ga 3O 12: Ce single crystals

Kasimova¹,

Козлова²,

Бузанов³

et al. 2019

MoEM

View full text Add to dashboard Cite

Scintillation materials capable of transforming absorbed high-energy particles into visible radiation photons find multiple applications including advanced medical visualization methods. Gd3Al2Ga3O12 : Ce is a promising oxygen-containing sсintillator for fabrication of detecting crystals of positron emission tomographs due to its unique properties, e.g. high density, high light yield, radiation hardness etc. However its kinetic parameters currently restrict its use in this field. Attempts at improving the luminescence rise and decay time kinetics by introducing additional impurities have become a top priority task for many researchers. Analyzing literary data one can conclude that the optical parameters of co-doped crystals have been studied insufficiently or have not been studied at all. We have studied Ca2+ and Zr4+ co-doped Gd3Al2Ga3O12 : Ce single crystals by optical spectroscopy in the 200–2200 nm. We have taken the optical transmittance, absorption and reflection spectra and measured the refractive indices. Dispersion curves have been obtained by approximation of experimental refractive indices using the Brewster method and the Cauchy equation. Material constants of these equations have been estimated for each of the co-doped crystals.

show abstract

Relationship between Ca2+ concentration and the properties of codoped Gd3Ga3Al2O12:Ce scintillators

Cited by 20 publications

References 27 publications

Garnet Scintillators of Superior Timing Characteristics: Material, Engineering by Liquid Phase Epitaxy

Garnet Scintillators of Superior Timing Characteristics: Material, Engineering by Liquid Phase Epitaxy

Excitation Transfer Engineering in Ce‐Doped Oxide Crystalline Scintillators by Codoping with Alkali‐Earth Ions

Effect of Ca 2+ and Zr 4+ co-doping on the optical properties of Gd 3Al 2Ga 3O 12: Ce single crystals

Contact Info

Product

Resources

About