Scintillation detectors working with CaF2 - Eu single crystals

Шульгин, Б. В.; Buzmakova, S. I.; Viktorov, L. V.; Krymov, A. L.; Петров, В. Л.; Podurovskii, S. V.; Kozlov, A.; Shapiro, Boris; Shrom, M.Yu.; Nepomnyashchikh, A. I.; Figura, P.; Lakhov, V. M.

doi:10.1007/bf00738982

Cited by 12 publications

(9 citation statements)

References 1 publication

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“…However, above 722.907 keV the emitted radiation will only reflect ground-state decay, through the higher-energy portions of its Ebranches with 1.649 MeV and 1.017 MeV. A CaF 2 (Eu) scintillator/PMT detector was chosen as most sensitive for measurement of 108g Ag E -decay, as CaF 2 (Eu) is well-known for minimized electron backscattering [24]. The scintillator is 1 mm thick with a diameter of 7.62 cm, and has a 50 Pm aluminized Mylar entrance window.…”

Section: Methodsmentioning

confidence: 99%

Nuclear structure and depletion of nuclear isomers using electron linacs

Carroll¹,

Litz²,

Netherton³

et al. 2013

AIP Conference Proceedings

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Long-lived nuclear excited states (isomers) have proven important to understanding nuclear structure. With some isomers having half-lives of decades or longer, and intrinsic energy densities reaching 10 12 J/kg, they have also been suggested for a wide range of applications. The ability to effectively transfer a population of nuclei from an isomer to shorter-lived levels will determine the feasibility of any applications. Here is described a first demonstration of the induced depletion of a population of the 438 year isomer of 108 Ag to its 2.38 min ground state, using 6 MeV bremsstrahlung from a modified medical electron linac. The experiment suggests refinements to be implemented in the future and how a similar approach might be applied to study induced depletion of the 1200 year isomer of 166 Ho.

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Section: Methodsmentioning

confidence: 99%

Nuclear structure and depletion of nuclear isomers using electron linacs

Carroll¹,

Litz²,

Netherton³

et al. 2013

AIP Conference Proceedings

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“…The inset shows an enlarged view in the 550-680 nm range. Intense emission peaks were observed at 300 and 430 nm in all the samples, and these peaks were ascribed to STE of CaF 2 and the 5d-4f transitions of Eu 2+ , respectively [8]. In addition, emission peaks at 570, 590, 615 and 625 nm appeared in all the samples, due to the 4f-4f transitions of Eu 3+ [28].…”

Section: Optical Propertiesmentioning

confidence: 81%

“…The scintillation decay curves of all the samples were approximated by single exponential decay function. The derived decay time constants of the 0.01, 0.02, 0.05 and 0.1 % Eu-doped samples were 0.84, 0.81, 0.78 and 0.75 μs, respectively, and ascribed to the 5d-4f transitions of Eu 2+ [8].…”

Section: Scintillation Propertiesmentioning

confidence: 91%

“…Scintillation properties of CaF 2 doped with Eu 2+ (CaF 2 :Eu) have been studied since the first report was published in 1966 [7]. The CaF 2 :Eu shows scintillation emissions due to self-trapped excitons (STE) and Eu 2+ 5d-4f transitions at 270 and 420 nm, respectively [8]. In addition, the CaF 2 :Eu is known to have high light yield (24,000 photons/MeV) [9].…”

Section: Introductionmentioning

confidence: 99%

“…Here, the X-ray tube voltage was 80 kV and current was 2.5 mA. All the samples exhibited a peak at 430 nm due to the 5d-4f transitions of Eu 2+[8]. The OSL intensity decreased with an increase in the concentration of Eu, which was once again inversely proportional to the TSL intensity.…”

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confidence: 97%

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Scintillation and dosimeter properties of CaF2 transparent ceramic doped with Eu2+

Nakamura

Kato

Okada

et al. 2017

Ceramics International

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We have developed CaF 2 transparent ceramics doped with Eu 2+ (CaF 2 :Eu) by using spark plasma sintering (SPS), and investigated the scintillation, dosimeter and photoluminescence (PL) properties. Under X-ray irradiation, all the samples showed emission due to self-trapped excitons (STE) and 5d-4f transition of Eu 2+ at 300 and 430 nm, respectively. In addition, weak emission due to the 4f-4f transitions of Eu 3+ at 570, 590, 615 and 625 nm were also present in all the samples. Under 137 Cs irradiation, the light yields of the 0.01, 0.02, 0.05 and 0.1 Eu-doped samples were estimated to be 16,400, 15,400, 17,700 and 14,300 photons/MeV, respectively. Thermally stimulated luminescence (TSL) glow curves of all the samples exhibited glow peaks at 100 and 180 °C, and these intensities increased linearity as a function of X-ray dose from 0.1 mGy to 1000 mGy. Furthermore, the CaF 2 :Eu showed not only TSL but also optically stimulated luminescence (OSL).

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