The quest for the ideal inorganic scintillator

Derenzo, Stephen E.; Weber, M.; Bourret-Courchesne, Edith; Klintenberg, Mattias

doi:10.1016/s0168-9002(03)01031-3

Cited by 313 publications

(192 citation statements)

References 14 publications

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“…These data were corrected for the optical response of the monochromator and the background in order to diminish any systematic errors. Additional inherent optical photon energy distributions for various phosphors (LaCl 3 :Ce with dopand concetration 0.1%, CdS:In, CdS:In, Te, CdS:Te, HiLight T M ), where obtained from literature [8][9][10]. The corresponding values of, E eλ var [E] eλ , E iλ and var [E] iλ were calculated according to previous studies [3,4].…”

Section: Methodsmentioning

confidence: 99%

Evaluating optical spectral matching of phosphor-photodetector combinations

et al. 2009

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Phosphor materials are used in medical X-ray imaging combined with various photodetectors suitable for conventional and digital radiography and fluoroscopy. A prerequisite for these combinations is good optical spectral matching, which results in patient dose minimization. In the present work, a recently introduced factor, named OGTE, which accounts for optical gain signal-to-noise ratio transfer efficiency, is utilized for the evaluation of various phosphorphotodetector combinations. The optical photon spectrum of the phosphor materials studied was either determined experimentally, or obtained from literature. These phosphors were examined in conjunction with various photodetectors, which may be suitable for digital imaging. The corresponding optical response functions of the photodetectors were obtained from literature. It was found that there are numerous combinations exhibiting OGTE values above 0.80, which contribute to patient dose minimization.

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Section: Methodsmentioning

confidence: 99%

Evaluating optical spectral matching of phosphor-photodetector combinations

et al. 2009

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“…The BGO fluorescence time increases to a few microseconds as the temperature is lowered, making fast timing resolution more difficult. This phenomenon arises from a spin-forbidden process responsible for light emission from the scintillator excitation [30]. Finally, photons at the energies of interest interact with BGO primarily through the photoelectric effect, with Compton scattering becoming more important at higher photon energies.…”

Section: Photon Detectionmentioning

confidence: 99%

Radiativeβdecay of the free neutron

et al. 2010

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The theory of quantum electrodynamics predicts that the β decay of the neutron into a proton, electron, and antineutrino is accompanied by a continuous spectrum of emitted photons described as inner bremsstrahlung. While this phenomenon has been observed in nuclear β decay and electron-capture decay for many years, it has only been recently observed in free-neutron decay. We present a detailed discussion of an experiment in which the radiative decay mode of the free neutron was observed. In this experiment, the branching ratio for this rare decay was determined by recording photons that were correlated with both the electron and proton emitted in neutron decay. We determined the branching ratio for photons with energy between 15 and 340 keV to be (3.09 ± 0.32) × 10 −3 (68% level of confidence), where the uncertainty is dominated by systematic effects. This value for the branching ratio is consistent with theoretical predictions. The characteristic energy spectrum of the radiated photons, which differs from the uncorrelated background spectrum, is also consistent with the theoretical spectrum.

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“…Over the past few decades, halide compounds have shown great potential as the next generation scintillators [4,[9][10][11]. For instance, LaBr3:Ce achieves a state-of-art coincidence resolving time of 100 ps for time-of-flight PET [12].…”

Section: Introductionmentioning

confidence: 99%

Scintillation Properties and Electronic Structures of the Intrinsic and Extrinsic Mixed ElpasolitesCs2NaRBr3I3
Wei
¹
,
Du
²
,
Stand
³

et al. 2016
Phys. Rev. Applied
25
0
6
0
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Scintillators attract wide research interest for their distinct applications in radiation detection. Elpasolite halides are among the most promising scintillators due to their high structural symmetry and good scintillation performance. Better understanding of their underlying scintillation mechanism opens up new possibilities in scintillator development. In this work, we employ a variety of experimental techniques to study the two mixed-anion elpasolites Cs2NaRBr3I3 (R = La, Y). The emission of intrinsic Cs2NaRBr3I3 with a light yield ranging from 20,000 to 40,000 ph/MeV is dominant by self-trapped exciton emission. Partial substitution of R with Ce introduces a competing emission, the Ce 3+ 5d to 4f radiative transition. Ab initio calculations were performed to investigate the electronic structures as well as the binding energies of polarons in Cs2NaRBr6. The calculated large self-trapped exciton binding energies are consistent with the observed high light yield due to self-trapped exciton emission. The unique electronic structure of halide elpasolites as calculated enhances the STE stability and the STE emission. The highly tunable scintillation properties of mixed-anion elpasolites underscore the role of their complex scintillation mechanism. Our study provides guidance for the design of new elpasolites scintillators with exceptional energy resolution and light yield desirable for applications.

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The quest for the ideal inorganic scintillator

Cited by 313 publications

References 14 publications

Evaluating optical spectral matching of phosphor-photodetector combinations

Evaluating optical spectral matching of phosphor-photodetector combinations

Radiativeβdecay of the free neutron

Scintillation Properties and Electronic Structures of the Intrinsic and Extrinsic Mixed ElpasolitesCs2NaRBr3I3
Wei
¹
,
Du
²
,
Stand
³

et al. 2016
Phys. Rev. Applied
25
0
6
0
View full text Add to dashboard Cite

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The quest for the ideal inorganic scintillator

Cited by 313 publications

References 14 publications

Evaluating optical spectral matching of phosphor-photodetector combinations

Evaluating optical spectral matching of phosphor-photodetector combinations

Radiativeβdecay of the free neutron

Scintillation Properties and Electronic Structures of the Intrinsic and Extrinsic Mixed ElpasolitesCs2NaRBr3I3Wei1, Du2, Stand3 et al. 2016Phys. Rev. Applied25060View full textAdd to dashboardCite

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Scintillation Properties and Electronic Structures of the Intrinsic and Extrinsic Mixed ElpasolitesCs2NaRBr3I3
Wei
¹
,
Du
²
,
Stand
³

et al. 2016
Phys. Rev. Applied
25
0
6
0
View full text Add to dashboard Cite