Optical and scintillation properties of Ca3NbGa3Si2O14 single crystal grown by micro-pulling down method

Futami, Yoshisuke; Yokota, Yuui; Sato, Masato; Yanagida, Takayuki; Kawaguchi, Noriaki; Fujimoto, Yutaka; Tota, Kazushige; Onodera, Ko; Yoshikawa, Akira

doi:10.1016/j.jcrysgro.2012.01.029

Cited by 4 publications

(5 citation statements)

References 25 publications

(30 reference statements)

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“…In a comparison with the light yield of the calibrated Sndoped glass scintillator with a similar emission wavelength, (20) that of SNGS turned out to be 850 ph/MeV. In other langasite-type materials, the pulse height spectrum could not be observed; (2,3) thus the light yield of SNGS was considerably higher than those of the other langasite-type scintillators studied so far. At the same time, the 241 Am α-ray-induced pulse height spectrum was also evaluated, and the light yield under 5.5 MeV α-ray was 640 ph/5.5 MeV-α.…”

Section: Resultsmentioning

confidence: 81%

“…Up to now, many materials have been investigated for this application. Among them, La 3 (LNGA), and LTGA. (2,3) In previous studies, we found that these langasite crystals exhibited an interesting feature of very fast sub-ns decay in the visible wavelength range and a detectable scintillation signal.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, La 3 (LNGA), and LTGA. (2,3) In previous studies, we found that these langasite crystals exhibited an interesting feature of very fast sub-ns decay in the visible wavelength range and a detectable scintillation signal. (2,3) Therefore, it was proved that langasite crystals can be potentially suitable for scintillator applications.…”

Section: Introductionmentioning

confidence: 99%

“…(2,3) Up to now, the transmittance of SNGS has been reported several times, (12)(13)(14) but no study about emission properties has been carried out.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Optical and Scintillation Responses of Sr3NbGa3Si2O14 (SNGS) and La3Ta0.5Ga5.3Al0.2O14 (LTGA) Crystals

2015

Sensors and Materials

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Optical and scintillation properties of Sr 3 NbGa 3 Si 2 O 14 (SNGS) single crystal were evaluated for the first time and compared with those of La 3 Ta 0.5 Ga 5.3 Al 0.2 O 14 (LTGA), which was previously reported to exhibit such properties. SNGS showed ~80% optical transmittance at wavelengths longer than 250 nm. Under 250 nm excitation, a strong photoluminescence (PL) appeared at 400 nm with a primary decay time of 1.4 ns. In an X-ray-induced radioluminescence spectrum, an intense emission peak at 400 nm was observed, and the primary scintillation decay time was ~1.37 μs. Finally, the absolute scintillation light yield of SNGS turned out to be 850 photons/MeV, which was higher than that of LTGA.

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Section: Resultsmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…(2,3) Up to now, the transmittance of SNGS has been reported several times, (12)(13)(14) but no study about emission properties has been carried out.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparative Study of Optical and Scintillation Responses of Sr3NbGa3Si2O14 (SNGS) and La3Ta0.5Ga5.3Al0.2O14 (LTGA) Crystals

2015

Sensors and Materials

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“…There was an absorption peak around 450 nm. It was related to color center which is sensitive to oxygen partial pressure [5]. However, the absorption peak around 350 nm was not detected and it was considered as the consequence of lattice defect, which also proved that as-grown crystal was of fine quality.…”

Section: Optical Propertiesmentioning

confidence: 97%

Growth and characterization of Ca<inf>3</inf>NbGa<inf>3</inf>Si<inf>2</inf>O<inf>14</inf> crystal fibers for high-temperature applications

Lin

Zheng

et al. 2014

Proceedings of the 2014 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications

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crystal fibers along 〈110〉 direction were grown by micro-pulling-down method with two different rates. The as-grown crystals were high transparent and had no crack. Due to the shape of die and crystal habit, the shape of as-grown crystals grown at 3 mm/h were approximately circular while they were approximately rectangular when grown at 1.2 mm/h. The center area of as-grown wafers perpendicular to the growth direction was free of second phase and low-angle boundaries. The second phase of Ca-Nb-O system was discovered in the peripheral area and was detected to have Ca 2 Nb 2 O 7 and CaNb 2 O 6 phase and other phases. The as-grown crystals were also investigated to have great optical quality, high electric resistivity and high piezoelectric constant d 11 . The research was benefit to the development of shaped-controlled crystals applied to high-temperature sensors.

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Optical and scintillation properties of Sr3BGa3Si2O14 (B= Nb, Ta) single crystals

Yokota

Ito

Kurosawa

et al. 2016

Radiation Measurements

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Optical and scintillation properties of Sr 3 NbGa 3 Si 2 O 14 [SNGS] and Sr 3 TaGa 3 Si 2 O 14 [STGS] single crystals with the langasite-type crystal structure were investigated as a novel scintillator materials. In the transmittance spectra of the SNGS and STGS polished specimens, absorption peaks around 380 and 505 nm were observed and the absorptions are considered to be attributable to the excess oxygen in the crystals. An emission peak around 420 nm was observed in the X-ray radioluminescence spectrum of the SNGS crystal. On the other hand, there was an emission peak around 335 nm in the X-ray radioluminescence spectrum of the STGS crystal.

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Optical and scintillation properties of Ca3NbGa3Si2O14 single crystal grown by micro-pulling down method

Cited by 4 publications

References 25 publications

Comparative Study of Optical and Scintillation Responses of Sr3NbGa3Si2O14 (SNGS) and La3Ta0.5Ga5.3Al0.2O14 (LTGA) Crystals

Comparative Study of Optical and Scintillation Responses of Sr3NbGa3Si2O14 (SNGS) and La3Ta0.5Ga5.3Al0.2O14 (LTGA) Crystals

Growth and characterization of Ca<inf>3</inf>NbGa<inf>3</inf>Si<inf>2</inf>O<inf>14</inf> crystal fibers for high-temperature applications

Optical and scintillation properties of Sr3BGa3Si2O14 (B= Nb, Ta) single crystals

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