Correction of quenching effect of a small size OSL dosimeter using Eu:BaFBr and Ce:CaF2

Hirata, Yuho; Watanabe, K.; Uritani, Akira; Yamazaki, Atsushi; Koba, Yusuke; Matsufuji, Naruhiro; Yanagida, Takayuki; Fukuda, Kentaro

doi:10.1016/j.radmeas.2017.03.043

Cited by 20 publications

(12 citation statements)

References 14 publications

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“…For this reason, they are often referred to as dosimeters. The materials showing TSL and OSL have been mainly used in individual radiation monitoring (5)(6)(7) and imaging plates (IPs). (8,9) The recent trend of development of scintillators is based on a combination of inorganic materials as the host and rare-earth ions as emission centers, e.g., Ce:Tb 3 Al 5 O1 2 (10) .…”

Section: Introductionmentioning

confidence: 99%

Scintillation and Dosimetric Properties of Ce:CsCl Transparent Ceramics

Kimura¹,

Nakamura²,

Kato³

et al. 2018

Sensors and Materials

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Ce:CsCl transparent ceramics doped with different concentrations of Ce (0.01, 0.1, and 1 mol.%) were synthesized by spark plasma sintering, and their optical, scintillation and dosimetric properties were investigated. Regarding the scintillation properties, X-ray-induced scintillation spectra of the samples consisted of three emission peaks at around 280, 380, and 400 nm, which were due to the Auger-free luminescence and 5d→4f ( 2 F 5/2 and 2 F 7/2 ) transitions of Ce 3+, respectively. In addition, the samples showed thermally stimulated luminescence (TSL) and optically stimulated luminescence (OSL) with emission peaks centering at around 400 and 480 nm, in which the origins were attributed to the 5d-4f transitions of Ce 3+ and the host, respectively. In particular, the TSL was sensitive to X-rays, and the TSL signals as low as 0.1 mGy were measurable, while a linear response was confirmed up to 100 mGy.

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Section: Introductionmentioning

confidence: 99%

Scintillation and Dosimetric Properties of Ce:CsCl Transparent Ceramics

Kimura¹,

Nakamura²,

Kato³

et al. 2018

Sensors and Materials

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“…(14,15) Figure 5 shows the phantom thickness dependence of signal intensities obtained from the fabricated small-size dosimeters. The measurements were carried out three times at each phantom thickness.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 8 shows the relationship between the normalized luminescence efficiencies and the averaged LET when the dosimeters were irradiated with 290 MeV/u carbon ions, which were already reported. (14,15) These efficiencies were normalized at zero thickness, where the LET was 14.41 keV/μm. The luminescence efficiencies of Eu:BaFBr and Ce:CaF 2 decreased monotonically as the averaged LET increases.…”

Section: Discussionmentioning

confidence: 99%

“…Some basic performances of these small-size dosimeters were already evaluated. (9,10) Since the LET of high-energy charged heavy particles, such as carbon ions, gradually increases with decreasing energy, a charged particle has LET variation along its track and has a quite high LET at the end of the track. The quenching phenomenon, which is the degradation of the luminescence efficiency in luminescence materials for high-LET particles, was reported by a number of researchers.…”

Section: Introductionmentioning

confidence: 99%

“…(11)(12)(13) This phenomenon was also observed in our small-size dosimeter, and the level of quenching was varied among the phosphors. (14,15) The quenching effect is considered to be due to the temporal and local deficiencies of luminescence origins, such as trap centers in OSL materials. High-LET particles cause highly dense ionization and excitation.…”

Section: Introductionmentioning

confidence: 99%

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Particle Dependence of Quenching Effect in an Optical-Fiber-Type Optically Stimulated Luminescence Dosimeter

Hirata

Watanabe

Yoshihashi

et al. 2017

Sensors and Materials

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To monitor an actual dose in a patient's body during radiotherapy treatment, we have developed a small-size dosimeter of an optical fiber probe mounting optically stimulated luminescence (OSL) materials at the tip. The OSL materials show a quenching effect when they are irradiated by charged particles with high linear energy transfer (LET). We evaluate the particle dependence on the quenching effect in the small-size OSL dosimeter probe. Eu:BaFBr and Ce:CaF 2 were adopted as OSL materials, and two types of small-size dosimeter were fabricated. We irradiated 290 MeV/u carbon ions, 150 MeV/u helium ions, and 225 MeV protons and measured the Bragg peak. The Eu:BaFBr small-size dosimeter showed the quenching effect in these three types of particle irradiation. The Ce:CaF 2 small-size dosimeter showed the quenching effect only in carbon ion irradiation. The luminescence efficiencies of Eu:BaFBr were compared among these three charged particles. The quenching effect of Eu:BaFBr is independent of the irradiated particles.

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Thermally Stimulated Luminescent (TSL) Materials

Shinsho

2022

Phosphors for Radiation Detectors

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Correction of quenching effect of a small size OSL dosimeter using Eu:BaFBr and Ce:CaF2

Cited by 20 publications

References 14 publications

Scintillation and Dosimetric Properties of Ce:CsCl Transparent Ceramics

Scintillation and Dosimetric Properties of Ce:CsCl Transparent Ceramics

Particle Dependence of Quenching Effect in an Optical-Fiber-Type Optically Stimulated Luminescence Dosimeter

Thermally Stimulated Luminescent (TSL) Materials

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