Understanding the scintillation efficiency of cerium-doped LSO, LYSO, YSO and LPS crystals from microwave study of photoconductivity and trapping

Loudyi, H.; Guyot, Y.; Gâcon, J.C.; Pédrini, C.; Joubert, M.-F.

doi:10.1016/j.optmat.2006.11.014

Cited by 20 publications

(8 citation statements)

References 18 publications

(19 reference statements)

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“…If the permanent trapping mechanism can be reversed, which several studies suggests [21,29,31], so that the cerium fluorescence signal comes back on demand, it might have interesting uses e.g. for long-lived spectrally tailored filters and slow light applications [32][33][34].…”

Section: Discussionmentioning

confidence: 99%

“…Using the AOM in the laser beam, a sequence of fre- To investigate this permanent hole burning mechanism further, a rate equation model using the 4f, 5d, conduction band, and trap state seen in figure 7 was analyzed [21,29]. In the model, an electron reaching the conduction band can either escape to a permanent trap via spontaneous decay, or recombining with the Ce ion.…”

Section: Permanent Trappingmentioning

confidence: 99%

“…Note that this means that the trap state should not be an internal state of the cerium ion. It is possible that the electron in the conduction band finds another crystal impurity, for example an oxygen vacancy [29].…”

Section: Permanent Trappingmentioning

confidence: 99%

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High-resolution transient and permanent spectral hole burning inCe3+:Y2SiO5at liquid helium temperatures

et al. 2016

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We perform hole burning with a low drift stabilized laser within the zero phonon line of the 4f-5d transition in Ce 3+ :Y2SiO5 at 2K. The narrowest spectral holes appear for small applied magnetic fields and are 6 ± 4 MHz wide (FWHM). This puts an upper bound on the homogeneous linewidth of the transition to 3 ± 2 MHz, which is close to lifetime limited. The spin level relaxation time is measured to 72 ± 21 ms with a magnetic field of 10 mT.A slow permanent hole burning mechanism is observed. If the excitation frequency is not changed the fluorescence intensity is reduced by more than 50% after a couple of minutes of continuous excitation. The spectral hole created by the permanent hole burning has a width in the tens of MHz range, which indicates that a trapping mechanism occurs via the 5d-state.

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Section: Discussionmentioning

confidence: 99%

Section: Permanent Trappingmentioning

confidence: 99%

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High-resolution transient and permanent spectral hole burning inCe3+:Y2SiO5at liquid helium temperatures

et al. 2016

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“…Its detailed features can be found in refs. 21,22,23. Each scintillator will have two SiPMs coupled to its ends, in order to allow the determination of the DOI while collecting as much scintillation light as possible thus optimising the energy resolution (see Fig.…”

Section: Experimental Set Upmentioning

confidence: 99%

Assessment of a high-resolution candidate detector for prostate time-of-flight positron emission tomography

Coséntino

Finocchiaro

Pappalardo

et al. 2012

Review of Scientific Instruments

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We report on the measurements performed using a (22)Na source on a detector element for a magnetic resonance imaging-compatible time-of-flight-positron emission tomography endorectal prostate probe, with depth-of-interaction sensitivity. It is made from a LYSO scintillator crystal, wrapped with Lumirror, readout at both ends by means of silicon photomultipliers. With a detailed description of the data analysis procedure, we show that our results point to a 400 ps coincidence resolving time and, at the same time, to a depth-of-interaction resolution of 1 mm. These appealing features, along with the tiny 1.5 mm × 1.5 mm × 10 mm crystal size, are quite promising in view of the realization of a prototype probe.

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“…Silicon-based nanoparticles have been especially extensively probed for potential medical applications due to their low inherent toxicity, especially when administered chronically (Murugadoss 2017). Wide band gap materials doped with rare earth ions are under intense research for their applications in medical imaging and have been used in the development of PET detectors for their scintillating properties (Loudyi 2007). More recently however, rare earth orthosilicates such as yttrium orthosilicate doped with cerium Y2SiO5:Ce (YSO:Ce) have been studied for their additional scintillating properties (Ricci 2008, Hamroun 2018.…”

Section: Introductionmentioning

confidence: 99%

Biodistribution and inflammatory response to intracranial delivery of scintillating nanoparticles

Fischer

Zimmerman

Zhang

et al. 2019

Preprint

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Nanoparticle-based delivery systems have become a popular method for targeting tumors and impermeable tissue with drugs for treatment and imaging markers for biodetection. Nanomaterials are beneficial for medical treatment because they can be modified to have increased stability and carrying capacity, and their size and surface modifications allow them to reach otherwise impenetrable tissue. Nanoparticles have become particularly popular in medical imaging since they can be produced as scintillators that emit visible light which can be used in PET detectors, or they could be made with paramagnetic materials for magnetic resonance imaging. Localized or systemic injection can be used for delivery of nanoparticles; however, systemic injection without appropriate surface modifications is subjected to uptake by the mononuclear phagocytic system which clears particles from the circulation rapidly limiting their accumulation at target tissue and reducing efficacy. Here we demonstrate the biodistribution of Yttrium oxyorthosilicate nanoparticles doped with Cerium after localized injection to the cerebral cortex.

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Understanding the scintillation efficiency of cerium-doped LSO, LYSO, YSO and LPS crystals from microwave study of photoconductivity and trapping

Cited by 20 publications

References 18 publications

High-resolution transient and permanent spectral hole burning inCe3+:Y2SiO5at liquid helium temperatures

High-resolution transient and permanent spectral hole burning inCe3+:Y2SiO5at liquid helium temperatures

Assessment of a high-resolution candidate detector for prostate time-of-flight positron emission tomography

Biodistribution and inflammatory response to intracranial delivery of scintillating nanoparticles

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