Response Measurement of Gd2Si2O7:Ce Scintillator for Alpha Particles

Tsubota, Youichi; Kaneko, Junichi; Kondo, K.; Izaki, Kenji; Higuchi, Mikio; Shimaoka, Takehiro; Fujita, Fumiyuki; Nishiyama, Shusuke

doi:10.15669/pnst.3.97

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…Evolution of crystalline structure of Gd 2 Si 2 O 7 after substitution of Gd 3+ with larger rare-earth cations of La 3+ , Ce 3+ , and/or Pr 3+ according to refs , , and − . The RE 2 Si 2 O 7 pyrosilicate (or disilicate) compounds form four types of structures including monoclinic (1 as shown on vertical axis), triclinic (2), orthorhombic (3), and tetragonal (4) ones.…”

Section: Discussionmentioning

confidence: 99%

Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)₂Si₂O₇ Scintillating Crystals

Yoshikawa

Kurosawa

Shoji

et al. 2015

Crystal Growth & Design

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Ce-doped lantanium-gadolinium pyrosilicate (La,Ce,Gd) 2 Si 2 O 7 (Ce:La-GPS), crystals with various content of rare-earth elements were produced from the melt, and their optimal La/Gd ratio was examined. It was found that Ce:La-GPS single crystals of acceptable optical quality can be produced from the melts ranging from La 0.5 Gd 1.5 Si 2 O 7 to La 1.0 Gd 1.0 Si 2 O 7 and containing about 1 atom % Ce with respect to the host rare-earths of La and Gd. The crystal growth was performed by the micro-pulling-down and Czochralski methods. The crystals were chemically uniform along the growth axis, and their composition was equal to that of the melt, thus corresponding to vicinity of congruent melting composition. Spatial distribution of Ce in La-GPS was also inspected, and no variation of Ce content was detected as a result of its similarity to one of the host cations (La) regarding the size. Basic optical and scintillation properties of the Ce:La-GPS crystals are also reported, and it is demonstrated that partial substitution of Gd with La has no negative impact on crystal growth and physical performance of the crystals.

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Section: Discussionmentioning

confidence: 99%

Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)₂Si₂O₇ Scintillating Crystals

Yoshikawa

Kurosawa

Shoji

et al. 2015

Crystal Growth & Design

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“…To improve the scintillator plate energy resolution, fine powders were rinsed out using ethanol. The relation between grain size and energy resolution and influence of fine powders was explained in an earlier report [18]. First, the GPS grains were laid in the nearest proximity possible, with close packing on the glass substrate.…”

Section: 2mentioning

confidence: 99%

“…The GPS scintillator achieved energy resolution of 4.6% and 1.4 times the light yield of a conventional NaI:Tl scintillator for 662 keV gamma rays [17]. For 5.5 MeV alpha particles, light yields of 4.4 and 2.0 times compared with those of BGO [18] and YAP scintillator [16] were reported, respectively. The central wavelength of scintillation light from a GPS was 395 nm.…”

Section: Introductionmentioning

confidence: 99%

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An alpha particle detector based on a GPS mosaic scintillator plate for continuous air monitoring in plutonium handling facilities

Kaneko

Izaki

Toui

et al. 2016

Radiation Measurements

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An alpha particle detector was developed for continuous air monitoring of radioactive contamination in working chambers at plutonium handling facilities. A 5-cm-square Gd2Si2O7:Ce (cerium-doped gadolinium pyro-silicate, GPS:Ce) mosaic scintillator plate for alpha particle measurements was fabricated from GPS single-crystal grains of around 550 m diameter; the GPS grains were made of a GPS polycrystalline body grown using a top seeded solution method. The scintillator layer thickness was approximately 100 m. The surface filling rate of the GPS grains was ca. 62%. To suppress the influence of non-uniformity of pulse heights of a photomultiplier tube, a central part of ⌀40 mm of a 76-mm-diameter photomultiplier tube was used. In addition, 3 mm thick high-transmission glass was used as a substrate of the scintillator plate. The detector achieved energy resolution of 13% for 5.5 MeV alpha particles, detection efficiency of 61% and a radon progeny nuclide reduction ratio of 64.5%. A new alpha particle detector was developed to achieve a high radon progeny nuclide reduction ratio approaching that of a silicon semiconductor detector, with high resistance to electromagnetic noise and corrosion. Highlights ・An alpha particle detector was developed for continuous air monitoring. ・The detector comprises a mosaic scintillator plate and a photomultiplier tube. ・A 5-cm-square GPS mosaic scintillator plate was fabricated. ・Its respective energy resolution and detection efficiency were 13 and 61%.

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Radiation Hardness of Ce:(Gd, La)₂Si₂O₇ Scintillator Using 80-MeV Alpha Rays

Kurosawa¹,

Murakami²,

Yamaji³

et al. 2016

Proceedings of International Symposium on Radiation Detectors and Their Uses (ISRD2016)

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Ce-doped (Gd, La) 2 Si 2 O 7 scintillator has a high light output, fast decay time, and it has been expected to be applied in various fields. One of the applications is to use in the space for astronomy, and therefore, the evaluation of the radiation hardness is required. We grew a Ce-doped (Gd, La) 2 Si 2 O 7 single crystal by the Czochralski technique, and evaluated its radiation hardness using 80-MeV alpha rays in Tohoku University with a total dose of approximately 20,000 Gy. The light outputs and decay times were slightly degraded after the irradiation by few %. Only the energy resolution was degraded dramatically in the 80-MeV alpha-ray range, and Ce-doped (Gd, La) 2 Si 2 O 7 scintillator was found to have good radiation hardness for alpha rays.

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Response Measurement of Gd2Si2O7:Ce Scintillator for Alpha Particles

Cited by 3 publications

References 10 publications

Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)₂Si₂O₇ Scintillating Crystals

Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)₂Si₂O₇ Scintillating Crystals

An alpha particle detector based on a GPS mosaic scintillator plate for continuous air monitoring in plutonium handling facilities

Radiation Hardness of Ce:(Gd, La)₂Si₂O₇ Scintillator Using 80-MeV Alpha Rays

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Response Measurement of Gd2Si2O7:Ce Scintillator for Alpha Particles

Cited by 3 publications

References 10 publications

Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)2Si2O7 Scintillating Crystals

Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)2Si2O7 Scintillating Crystals

An alpha particle detector based on a GPS mosaic scintillator plate for continuous air monitoring in plutonium handling facilities

Radiation Hardness of Ce:(Gd, La)2Si2O7 Scintillator Using 80-MeV Alpha Rays

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Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)₂Si₂O₇ Scintillating Crystals

Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)₂Si₂O₇ Scintillating Crystals

Radiation Hardness of Ce:(Gd, La)₂Si₂O₇ Scintillator Using 80-MeV Alpha Rays