Luminescence properties of highly Cr co-doped Nd:YAG powder produced by sol–gel method

Fujioka, Kana; Saiki, Taku; Motokoshi, Shinji; Fujimoto, Yasushi; Fujita, Hisanori; Nakatsuka, Masahiro

doi:10.1016/j.jlumin.2009.10.012

Cited by 37 publications

(18 citation statements)

References 20 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Typical Cr 3+ luminescence peaks were also observed in all the spectra, which corresponds to the above described photoluminescence emission spectrum. They can be again ascribed to the Cr 3+ d-d transition from its 2 E to 4 A 2 states [6], [7]. In addition, elevated emission intensity around 740 nm in the Gd50YAG was also observed as well as in its photoluminescence spectrum.…”

Section: Resultsmentioning

confidence: 78%

“…4. All the samples showed a sharp luminescence around 700 nm due to Cr 3+ d-d transition from its excited state of 2 E to 4 A 2 [6], [7]. In the spectra of Cr:YAG and Cr:Gd25YAG, four emission peaks were observed around 680, 690, 700 and 730 nm, which are related to the luminescence of Cr 3+ ion incorporated into the garnet phase.…”

Section: Resultsmentioning

confidence: 92%

“…Cr-doped (Gd X Y 1-X ) 3 Al 5 O 12 (0 ≤ X < 1) crystal was widely used for high-intensity laser materials, and it can be one of the candidates for the described application because of the following reasons: (i) X-ray higher stopping power compared with Al 2 O 3 , (ii) non-hygroscopic nature, (iii) non-intrinsic background from radio-active isotopes such as 176 Lu. In addition, the emission wavelength of Cr-doped Y 3 Al 5 O 12 (Cr:YAG) is favorably placed around 700nm [6], [7], and thus similar characteristics can be expected 4 / 11 also for Cr-doped (Gd X Y 1-X ) 3 Al 5 O 12 (0 ≤ X < 1). However, scintillation properties of these garnet crystals have still remained unknown.…”

Section: Introductionmentioning

confidence: 83%

See 2 more Smart Citations

Luminescent properties of Cr-doped (Gd , Y1−)3Al5O12 infra-red scintillator crystals

et al. 2014

View full text Add to dashboard Cite

Cr-doped (Gd X Y 1-X ) 3 Al 5 O 12 (X = 0, 0.25, 0.50) crystals prepared by the micro-pulling down method were investigated to develop a infra-red scintillator for implantable patient dosimeter in radiation therapy. In order to evaluate their optical and scintillation performance, the following properties were measured: (i) transmittance between ultra-violet and near-infra red region, (ii) photoluminescence spectra under Xe-lamp excitation, (iii) X-ray excited radio-luminescence spectra. Cr:Y 3 Al 5 O 12 and Cr:(Gd 0.25 Y 0.75 ) 3 Al 5 O 12 crystals showed increased transmittance of 80 %, while Cr:(Gd 0.50 Y 0.50 ) 3 Al 5 O 12 had a lower transmittance of 40 % due to its polycrystalline structure. In addition, all the Cr:(Gd X Y 1-X ) 3 Al 5 O 12 crystals showed sharp scintillation luminescence peaks ascribed to Cr 3+ d-d transitions. Therefore, these results suggested that Cr:Y 3 Al 5 O 12 and Cr:(Gd 0.25 Y 0.75 ) 3 Al 5 O 12 crystals can be candidate materials © 2014. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 / 11 for the dosimeter use.

show abstract

Section: Resultsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 83%

See 1 more Smart Citation

Luminescent properties of Cr-doped (Gd , Y1−)3Al5O12 infra-red scintillator crystals

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The decrease in the emission intensity is caused by the concentration quenching of Bi 3+ . The total energy transfer efficiency depends not only on the probability of energy transfer from sensitizer to activator, but also on that between the sensitizers [15,17]. The energy transfer efficiency increases with the decrease of the distance between the sensitizer and activator (or sensitizer).…”

Section: Resultsmentioning

confidence: 99%

Effects of Bi3+ doping on the optical properties of Er3+:Y2O3

Yang

Sui

Wang

et al. 2011

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…In the photo-luminescence spectra, each sample demonstrated broad band associated with 4 T 2 →A 2 transitions, and a detectable narrow peak at approximately 693 nm originating from 2 E→ 4 A 2 transition (R-lines) was clearly observed for the Cr:YGG (Fig. 7) [15][16][17]. Although other samples should also have these R-lines, such peaks were not well-seen.…”

Section: Materials and Experimental Methodsmentioning

confidence: 96%

Luminescent properties of Cr-doped gallium garnet crystals grown by the micro-pulling-down method

Kurosawa

Suzuki

Yamaji

et al. 2016

Journal of Crystal Growth

View full text Add to dashboard Cite

Cr-doped (Gd x Y 1-x) 3 Ga 5 O 12 crystals (x = 0.00, 0.25, 0.50, 0.75 and 1.00) were grown by the micro-pulling-down method and examined for their possible application as red and infrared scintillating detectors in medical field. Although Cr:(Gd 0.75 Y 0.25) 3 Ga 5 O 12 and Cr:Gd 3 Ga 5 O 12 had similar X-ray diffraction patterns, other samples showed some change in lattice constant. All the crystals had broad emission bands in the red and infrared region when excited by either 450 nm photons or X rays. These bands were associated with 4 T 2 →A 2 transitions. Moreover, redshift of the emission-peak wavelengths (4 T 2 →A 2) and absorption peaks (A 2 → 4 T 1 and 4 T 2) was observed with increase of Gd content (x) in Cr-doped (Gd x Y 1-x) 3 Ga 5 O 12 due to the change of the crystal fields. The crystals had scintillation emissions in the wavelength region suitable for the real time dose monitoring in radiation therapy.

show abstract

Luminescence properties of highly Cr co-doped Nd:YAG powder produced by sol–gel method

Cited by 37 publications

References 20 publications

Luminescent properties of Cr-doped (Gd , Y1−)3Al5O12 infra-red scintillator crystals

Luminescent properties of Cr-doped (Gd , Y1−)3Al5O12 infra-red scintillator crystals

Effects of Bi3+ doping on the optical properties of Er3+:Y2O3

Luminescent properties of Cr-doped gallium garnet crystals grown by the micro-pulling-down method

Contact Info

Product

Resources

About