A 1-dimensional -ray position sensor based on GSO:Ce scintillators coupled to a Si strip detector

Itoh, Takeshi; Yanagida, Takayuki; Kokubun, M.; Sato, Mitsuhiro; Miyawaki, R.; Makishima, Kazuo; Takashima, Takeshi; Tanaka, Takaaki; Nakazawa, K.; Takahashi, Tadayuki; Shimura, N.; Ishibashi, Hiroyuki

doi:10.1016/j.nima.2007.04.144

Cited by 98 publications

(35 citation statements)

References 8 publications

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“…The interesting feature of MgB 2 is that it has a chemical composition consisting of light elements, making it suitable for dosimeter application, which requires a biological tissue equivalency against X-and γ-ray exposure. Furthermore, 10 B has a high interaction cross section with thermal neutrons and is potentially applicable to scintillators if detectable scintillation photons can be emitted. Therefore, MgB 2 is potentially applicable to both types of ionizing radiation detectors.…”

Section: Introductionmentioning

confidence: 99%

“…(5) Although the physical processes and signal read out techniques are different in these dosimeters, the basic concept, the absorption and storage of the energy of ionizing radiation, and the release of the energy by ultraviolet (UV)-visible photon emissions are the same. On the other hand, scintillators are phosphors that convert a single high-energy ionizing radiation into hundreds of visible photons, (6) and scintillation detectors have been widely used in practical applications in, for example, medical, (7) security, (8) well-logging, (9) and highenergy physics (10,11) fields. Recent trends in solid-state radiation detectors focus on the development of scintillators for neutron detectors because of the shortage of 3 He gas.…”

Section: Introductionmentioning

confidence: 99%

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Optical, Dosimeter, and Scintillation Properties of MgB2

2016

Sensors and Materials

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The optical, dosimeter, and scintillation properties of MgB 2 were investigated for the first time. MgB 2 was visibly black and showed 0.1-0.2% optical transmittance of wavelengths longer than 200 nm. Under 280 nm excitation, an intense luminescence peak appeared around 500 nm with a fast decay time of 8.8 ns. The temperature dependence of photoluminescence was examined in the range from 5 to 290 K, and the 500 nm band disappeared at low temperatures. To evaluate dosimeter properties, the thermally stimulated luminescence (TSL) glow curve and the linearity between the TSL intensity and the X-ray irradiation dose were examined. As a result, MgB 2 was found to exhibit good dosimeter properties. Finally, as a scintillation response, the X-ray-induced scintillation spectrum was evaluated and the emission peak at 470 nm was observed with a fast decay time of 11 ns.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optical, Dosimeter, and Scintillation Properties of MgB2

2016

Sensors and Materials

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“…(4) Scintillation detectors, usually consisting of scintillator materials and photodetectors, have played a major role in ionizing radiation detectors for use in medical, (5) security, (6) well-logging, (7) astrophysics, (8) and particle physics applications. (9) Although most commercial scintillators are Ce 3+ -doped, (10) since Ce 3+ 5d-4f transition is parity-and spinallowed, nondoped materials (e.g., ZnO (11) ) have also attracted much attention in terms of reducing the cost of rare earths that are generally doped into scintillators as emission centers.…”

Section: Introductionmentioning

confidence: 99%

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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“…However, there is one possibility for another application, scintillation device. Scintillators are phosphors which convert high energy (keV MeV) ionizing radiation to thousands of visible photons immediately [1] and are widely used in common applications, such as medical imaging (PET and X-ray CT) [2], security systems in ports and airports [3], well-logging [4], astrophysics [5], and particle physics [6]. Direct transition semiconductor materials are potentially good scintillators because a fast decay time can be expected.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Scintillation Properties of GaN

Yanagida

Fujimoto

Koshimizu

2014

e-J. Surf. Sci. Nanotechnol.

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Optical and scintillation properties of GaN crystalline film were investigated. It showed 30-50% in-line transmittance at wavelength longer than 400 nm and intense emission appeared at 365 nm under 213 nm excitation in photoluminescence (PL) spectrum. When PL decay time was investigated under 280 and 200 nm excitation, luminescence decay time resulted few ns. In X-ray induced radioluminescence spectra, intense emission appeared at 365, 420, and 550 nm. The former one was ascribed to the exciton emission and the latter two would be due to defects related emission. Scintillation decay time of GaN was quite fast as few ns which was consistent with PL results and no slow component was observed.

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A 1-dimensional -ray position sensor based on GSO:Ce scintillators coupled to a Si strip detector

Cited by 98 publications

References 8 publications

Optical, Dosimeter, and Scintillation Properties of MgB2

Optical, Dosimeter, and Scintillation Properties of MgB2

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

Evaluation of Scintillation Properties of GaN

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