Development of LuAG-based scintillator crystals – A review

Nikl, M.; Yoshikawa, Akira; Kamada, Kei; Nejezchleb, Karel; Stanek, C. R.; Mareš, J.; Blažek, K.

doi:10.1016/j.pcrysgrow.2013.02.001

Cited by 259 publications

(161 citation statements)

References 100 publications

Supporting

Mentioning

151

Contrasting

Unclassified

Order By: Relevance

“…The important role that defects play in scintillator performance has been well-documented [5]. However, recent studies involving co-doping of garnets have demonstrated dramatic improvements in light yield and these findings have consequently reinvigorated interest in garnets as high performance scintillators [6][7][8][9][10][11][12][13][14][15][16]. These optimization efforts have relied on the manipulation of the garnet electronic structure through admixing, and * syadav@lanl.gov, yadav.satyesh@gmail.com in the process creating so-called "multicomponent" garnets [17].…”

Section: Introductionmentioning

confidence: 99%

“…However, recent studies involving co-doping of garnets have demonstrated dramatic improvements in light yield and these findings have consequently reinvigorated interest in garnets as high performance scintillators [6][7][8][9][10][11][12][13][14][15][16]. These optimization efforts have relied on the manipulation of the garnet electronic structure through admixing, and * syadav@lanl.gov, yadav.satyesh@gmail.com in the process creating so-called "multicomponent" garnets [17]. It is well-known that cation antisite defects are present in garnets (RE 3+ on Al 3+ sites and vice versa) [18][19][20][21][22][23] and that they contribute to reduced scintillator performance [24] by creating traps for the electronic carriers which results in considerable slowing down of scintillation response.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Band-Gap and Band-Edge Engineering of Multicomponent Garnet Scintillators from First Principles

Yadav¹,

Uberuaga²,

Nikl³

et al. 2015

Phys. Rev. Applied

View full text Add to dashboard Cite

Complex doping schemes in RE3Al5O12 (RE=rare earth element) garnet compounds have recently led to pronounced improvements in scintillator performance. Specifically, by admixing lutetium and yttrium aluminate garnets with gallium and gadolinium, the band-gap was altered in a manner that facilitated the removal of deleterious electron trapping associated with cation antisite defects. Here, we expand upon this initial work to systematically investigate the effect of substitutional admixing on the energy levels of band edges. Density functional theory was used to survey potential admixing candidates that modify either the conduction band minimum (CBM) or valence band maximum (VBM). We considered two sets of compositions based on Lu3B5O12 where B = Al, Ga, In, As, and Sb; and RE3Al5O12, where RE = Lu, Gd, Dy, and Er. We found that admixing with various RE cations does not appreciably effect the band gap or band edges. In contrast, substituting Al with cations of dissimilar ionic radii has a profound impact on the band structure. We further show that certain dopants can be used to selectively modify only the CBM or the VBM. Specifically, Ga and In decrease the band gap by lowering the CBM, while As and Sb decrease the band gap by raising the VBM. These results demonstrate a powerful approach to quickly screen the impact of dopants on the electronic structure of scintillator compounds, identifying those dopants which alter the band edges in very specific ways to eliminate both electron and hole traps responsible for performance limitations. This approach should be broadly applicable for the optimization of electronic and optical performance for a wide range of compounds by tuning the VBM and CBM.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Band-Gap and Band-Edge Engineering of Multicomponent Garnet Scintillators from First Principles

Yadav¹,

Uberuaga²,

Nikl³

et al. 2015

Phys. Rev. Applied

View full text Add to dashboard Cite

show abstract

“…Supposedly, these anti-site defects are origin of the slow components in scintillation decay of Pr:LuAG [3].…”

mentioning

confidence: 99%

Crystal growth and scintillation properties of multi-component oxide single crystals: Ce:GGAG and Ce:La-GPS

Yoshikawa

Kamada

Kurosawa

et al. 2016

Journal of Luminescence

Self Cite

View full text Add to dashboard Cite

“…On the other hand, LuAG is formed with much heavier rare-earth oxide Lu instead of Y that makes LuAG more attractive for scintillating applications [37].…”

Section: Garnetsmentioning

confidence: 99%

Czochralski Growth and Properties of Scintillating Crystals

2013

Self Cite

View full text Add to dashboard Cite

The Czochralski method is one of the very few melt growth techniques that are industry friendly when considering the combination of quality, dimensions, and cost of the produced crystals suitable for their commercialization in scintillation detectors. This method is one of the oldest and most developed crystal growth processes regarding an adequate understanding the physical phenomena observed during solidication process and its practical expansion especially in the industrial scale production. It allows controllable formation of single-crystalline cylindrical ingots of various inorganic scintillation materials. The review summarizes recent progress on the Czochralski growth of a number of scintillation materials. The oxide crystals are mainly considered including the Ce and Pr--doped RE3Al5O12, RE = Y, Lu, aluminum garnets and newly discovered ultraecient Ce-doped Gd3(Ga,Al)5O12 multicomponent garnet, high density PbWO4 and CdWO4 tungstates, Ce-doped RE2SiO5, RE = Y, Gd, Lu, oxyorthosilicates and (Y,Lu)AlO3 aluminum perovskites and nally the classical Bi4Ge3O12 scintillator. Additionally, the details of the growth of other practically important non-oxide crystals, namely the Ce and Eu-doped LiCaAlF6 neutron and ultraecient Ce-doped LaBr3 scintillators, are discussed. The potential of novel micro-pulling down growth method is briey described in the combinatorial search for new scintillator materials. Selected luminescence and scintillation characteristics including the spectra and decay kinetics, light yield and radiation resistance are also illustrated and overviewed.

show abstract

Development of LuAG-based scintillator crystals – A review

Cited by 259 publications

References 100 publications

Band-Gap and Band-Edge Engineering of Multicomponent Garnet Scintillators from First Principles

Band-Gap and Band-Edge Engineering of Multicomponent Garnet Scintillators from First Principles

Crystal growth and scintillation properties of multi-component oxide single crystals: Ce:GGAG and Ce:La-GPS

Czochralski Growth and Properties of Scintillating Crystals

Contact Info

Product

Resources

About